21551504000010 has 32 divisors (see below), whose sum is σ = 52118446324032. Its totient is φ = 5703196986240.

The previous prime is 21551503999999. The next prime is 21551504000011. The reversal of 21551504000010 is 1000040515512.

It is not an unprimeable number, because it can be changed into a prime (21551504000011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2741917699 + ... + 2741925558.

It is an arithmetic number, because the mean of its divisors is an integer number (1628701447626).

Almost surely, 2^{21551504000010} is an apocalyptic number.

21551504000010 is an abundant number, since it is smaller than the sum of its proper divisors (30566942324022).

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

21551504000010 is a wasteful number, since it uses less digits than its factorization.

21551504000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483843398.

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 21551504000010 its reverse (1000040515512), we get a palindrome (22551544515522).

The spelling of 21551504000010 in words is "twenty-one trillion, five hundred fifty-one billion, five hundred four million, ten", and thus it is an aban number.