21136371050 has 24 divisors (see below), whose sum is σ = 39337818156. Its totient is φ = 8449351040.

The previous prime is 21136371041. The next prime is 21136371089. The reversal of 21136371050 is 5017363112.

It can be written as a sum of positive squares in 6 ways, for example, as 8884759081 + 12251611969 = 94259^2 + 110687^2 .

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, 47267 + ... + 210966.

Almost surely, 2^21136371050 is an apocalyptic number.

21136371050 is a deficient number, since it is larger than the sum of its proper divisors (18201447106).

21136371050 is a wasteful number, since it uses less digits than its factorization.

21136371050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259882 (or 259877 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The spelling of 21136371050 in words is "twenty-one billion, one hundred thirty-six million, three hundred seventy-one thousand, fifty".