15000420543012 has 72 divisors (see below), whose sum is σ = 38547889386552. Its totient is φ = 4917078604800.

The previous prime is 15000420542981. The next prime is 15000420543077. The reversal of 15000420543012 is 21034502400051.

15000420543012 is a `hidden beast` number, since 15 + 0 + 0 + 0 + 4 + 205 + 430 + 12 = 666.

15000420543012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5526373478976 + 9474047064036 = 2350824^2 + 3077994^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9163212 + ... + 10675452.

It is an arithmetic number, because the mean of its divisors is an integer number (535387352591).

Almost surely, 2^{15000420543012} is an apocalyptic number.

15000420543012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15000420543012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19273944693276).

15000420543012 is an abundant number, since it is smaller than the sum of its proper divisors (23547468843540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15000420543012 is a wasteful number, since it uses less digits than its factorization.

15000420543012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516829 (or 1516824 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 15000420543012 its reverse (21034502400051), we get a palindrome (36034922943063).

The spelling of 15000420543012 in words is "fifteen trillion, four hundred twenty million, five hundred forty-three thousand, twelve".