15421020000 has 120 divisors (see below), whose sum is σ = 50584226616. Its totient is φ = 4112256000.

The previous prime is 15421019981. The next prime is 15421020001. The reversal of 15421020000 is 2012451.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421020001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68509 + ... + 188508.

Almost surely, 2^15421020000 is an apocalyptic number.

15421020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15421020000 is an abundant number, since it is smaller than the sum of its proper divisors (35163206616).

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

15421020000 is an equidigital number, since it uses as much as digits as its factorization.

15421020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257050 (or 257027 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 15421020000 its reverse (2012451), we get a palindrome (15423032451).

The spelling of 15421020000 in words is "fifteen billion, four hundred twenty-one million, twenty thousand".