21036279050 has 24 divisors (see below), whose sum is σ = 39134125836. Its totient is φ = 8413082240.

The previous prime is 21036279037. The next prime is 21036279107. The reversal of 21036279050 is 5097263012.

It can be written as a sum of positive squares in 6 ways, for example, as 1341244129 + 19695034921 = 36623^2 + 140339^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21036279050.

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, 291152 + ... + 356148.

Almost surely, 2^21036279050 is an apocalyptic number.

21036279050 is a deficient number, since it is larger than the sum of its proper divisors (18097846786).

21036279050 is a wasteful number, since it uses less digits than its factorization.

21036279050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71482 (or 71477 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 21036279050 in words is "twenty-one billion, thirty-six million, two hundred seventy-nine thousand, fifty".