21003104624 has 40 divisors (see below), whose sum is σ = 42033119232. Its totient is φ = 10156282560.

The previous prime is 21003104587. The next prime is 21003104627. The reversal of 21003104624 is 42640130012.

It is a super-2 number, since 2×21003104624² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003104624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003104627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812117 + ... + 837579.

Almost surely, 2^21003104624 is an apocalyptic number.

It is an amenable number.

21003104624 is an abundant number, since it is smaller than the sum of its proper divisors (21030014608).

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

21003104624 is a wasteful number, since it uses less digits than its factorization.

21003104624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27165 (or 27159 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21003104624 its reverse (42640130012), we get a palindrome (63643234636).

The spelling of 21003104624 in words is "twenty-one billion, three million, one hundred four thousand, six hundred twenty-four".