21410044400 has 60 divisors (see below), whose sum is σ = 51480600864. Its totient is φ = 8556864000.

The previous prime is 21410044363. The next prime is 21410044471. The reversal of 21410044400 is 444001412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 470660 + ... + 514140.

Almost surely, 2^21410044400 is an apocalyptic number.

21410044400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21410044400 is an abundant number, since it is smaller than the sum of its proper divisors (30070556464).

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

21410044400 is a wasteful number, since it uses less digits than its factorization.

21410044400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44730 (or 44719 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21410044400 its reverse (444001412), we get a palindrome (21854045812).

The spelling of 21410044400 in words is "twenty-one billion, four hundred ten million, forty-four thousand, four hundred".