20015136460 has 96 divisors (see below), whose sum is σ = 47673722880. Its totient is φ = 6994521600.

The previous prime is 20015136457. The next prime is 20015136467. The reversal of 20015136460 is 6463151002.

It is not an unprimeable number, because it can be changed into a prime (20015136467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 587781 + ... + 620899.

It is an arithmetic number, because the mean of its divisors is an integer number (496601280).

Almost surely, 2^20015136460 is an apocalyptic number.

20015136460 is a gapful number since it is divisible by the number (20) 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 20015136460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23836861440).

20015136460 is an abundant number, since it is smaller than the sum of its proper divisors (27658586420).

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

20015136460 is a wasteful number, since it uses less digits than its factorization.

20015136460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33247 (or 33245 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 20015136460 its reverse (6463151002), we get a palindrome (26478287462).

The spelling of 20015136460 in words is "twenty billion, fifteen million, one hundred thirty-six thousand, four hundred sixty".