21503214435104 has 24 divisors (see below), whose sum is σ = 42359459109660. Its totient is φ = 10745256566016.

The previous prime is 21503214435067. The next prime is 21503214435113. The reversal of 21503214435104 is 40153441230512.

It can be written as a sum of positive squares in 2 ways, for example, as 18270050825104 + 3233163610000 = 4274348^2 + 1798100^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198402839 + ... + 198511190.

Almost surely, 2^{21503214435104} is an apocalyptic number.

It is an amenable number.

21503214435104 is a deficient number, since it is larger than the sum of its proper divisors (20856244674556).

21503214435104 is a wasteful number, since it uses less digits than its factorization.

21503214435104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396915732 (or 396915724 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21503214435104 its reverse (40153441230512), we get a palindrome (61656655665616).

The spelling of 21503214435104 in words is "twenty-one trillion, five hundred three billion, two hundred fourteen million, four hundred thirty-five thousand, one hundred four".