21086138350 has 24 divisors (see below), whose sum is σ = 39382979328. Its totient is φ = 8399452800.

The previous prime is 21086138323. The next prime is 21086138363. The reversal of 21086138350 is 5383168012.

It is a congruent number.

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, 862894 + ... + 886993.

It is an arithmetic number, because the mean of its divisors is an integer number (1640957472).

Almost surely, 2^21086138350 is an apocalyptic number.

21086138350 is a deficient number, since it is larger than the sum of its proper divisors (18296840978).

21086138350 is a wasteful number, since it uses less digits than its factorization.

21086138350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750140 (or 1750135 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 21086138350 in words is "twenty-one billion, eighty-six million, one hundred thirty-eight thousand, three hundred fifty".