21295835650 has 24 divisors (see below), whose sum is σ = 39625543044. Its totient is φ = 8515046400.

The previous prime is 21295835633. The next prime is 21295835663. The reversal of 21295835650 is 5653859212.

It can be written as a sum of positive squares in 6 ways, for example, as 3905875009 + 17389960641 = 62497^2 + 131871^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21295835650.

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, 50770 + ... + 212530.

Almost surely, 2^21295835650 is an apocalyptic number.

21295835650 is a deficient number, since it is larger than the sum of its proper divisors (18329707394).

21295835650 is a wasteful number, since it uses less digits than its factorization.

21295835650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164406 (or 164401 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 21295835650 in words is "twenty-one billion, two hundred ninety-five million, eight hundred thirty-five thousand, six hundred fifty".