21630035552 has 24 divisors (see below), whose sum is σ = 42592802112. Its totient is φ = 10812816000.

The previous prime is 21630035549. The next prime is 21630035591. The reversal of 21630035552 is 25553003612.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96977 + ... + 229487.

It is an arithmetic number, because the mean of its divisors is an integer number (1774700088).

Almost surely, 2^21630035552 is an apocalyptic number.

It is an amenable number.

21630035552 is a deficient number, since it is larger than the sum of its proper divisors (20962766560).

21630035552 is a wasteful number, since it uses less digits than its factorization.

21630035552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137622 (or 137614 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 21630035552 in words is "twenty-one billion, six hundred thirty million, thirty-five thousand, five hundred fifty-two".