21602894850 has 72 divisors (see below), whose sum is σ = 58076031780. Its totient is φ = 5757173760.

The previous prime is 21602894843. The next prime is 21602894909. The reversal of 21602894850 is 5849820612.

21602894850 is a `hidden beast` number, since 2 + 160 + 2 + 8 + 9 + 485 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 18945595449 + 2657299401 = 137643^2 + 51549^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 21602894796 and 21602894805.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 749506 + ... + 777794.

Almost surely, 2^21602894850 is an apocalyptic number.

21602894850 is an abundant number, since it is smaller than the sum of its proper divisors (36473136930).

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

21602894850 is a wasteful number, since it uses less digits than its factorization.

21602894850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30004 (or 29996 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 21602894850 in words is "twenty-one billion, six hundred two million, eight hundred ninety-four thousand, eight hundred fifty".