21053335432 has 32 divisors (see below), whose sum is σ = 42585701400. Its totient is φ = 9720515584.

The previous prime is 21053335427. The next prime is 21053335487. The reversal of 21053335432 is 23453335012.

It can be written as a sum of positive squares in 4 ways, for example, as 20441564676 + 611770756 = 142974^2 + 24734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21053335394 and 21053335403.

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, 1453207 + ... + 1467622.

Almost surely, 2^21053335432 is an apocalyptic number.

It is an amenable number.

21053335432 is an abundant number, since it is smaller than the sum of its proper divisors (21532365968).

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

21053335432 is a wasteful number, since it uses less digits than its factorization.

21053335432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920905 (or 2920901 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 31.

The spelling of 21053335432 in words is "twenty-one billion, fifty-three million, three hundred thirty-five thousand, four hundred thirty-two".