21652231634 has 16 divisors (see below), whose sum is σ = 35433792576. Its totient is φ = 9841126800.

The previous prime is 21652231619. The next prime is 21652231681. The reversal of 21652231634 is 43613225612.

It is a junction number, because it is equal to n+sod(n) for n = 21652231594 and 21652231603.

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, 304124 + ... + 368504.

It is an arithmetic number, because the mean of its divisors is an integer number (2214612036).

Almost surely, 2^21652231634 is an apocalyptic number.

21652231634 is a deficient number, since it is larger than the sum of its proper divisors (13781560942).

21652231634 is a wasteful number, since it uses less digits than its factorization.

21652231634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79681.

The product of its digits is 51840, while the sum is 35.

The spelling of 21652231634 in words is "twenty-one billion, six hundred fifty-two million, two hundred thirty-one thousand, six hundred thirty-four".