21701373850 has 48 divisors (see below), whose sum is σ = 43891690752. Its totient is φ = 7934996160.

The previous prime is 21701373821. The next prime is 21701373877. The reversal of 21701373850 is 5837310712.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95122 + ... + 229021.

It is an arithmetic number, because the mean of its divisors is an integer number (914410224).

Almost surely, 2^21701373850 is an apocalyptic number.

21701373850 is an abundant number, since it is smaller than the sum of its proper divisors (22190316902).

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

21701373850 is a wasteful number, since it uses less digits than its factorization.

21701373850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324271 (or 324266 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 21701373850 in words is "twenty-one billion, seven hundred one million, three hundred seventy-three thousand, eight hundred fifty".