21040045010 has 16 divisors (see below), whose sum is σ = 39865348800. Its totient is φ = 7973069616.

The previous prime is 21040045009. The next prime is 21040045043. The reversal of 21040045010 is 1054004012.

It is a self number, because there is not a number n which added to its sum of digits gives 21040045010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55368350 + ... + 55368729.

It is an arithmetic number, because the mean of its divisors is an integer number (2491584300).

Almost surely, 2^21040045010 is an apocalyptic number.

21040045010 is a deficient number, since it is larger than the sum of its proper divisors (18825303790).

21040045010 is a wasteful number, since it uses less digits than its factorization.

21040045010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110737105.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 21040045010 its reverse (1054004012), we get a palindrome (22094049022).

The spelling of 21040045010 in words is "twenty-one billion, forty million, forty-five thousand, ten".