21950874 has 24 divisors (see below), whose sum is σ = 51884352. Its totient is φ = 6651720.

The previous prime is 21950849. The next prime is 21950897. The reversal of 21950874 is 47805912.

It is a Curzon 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, 55234 + ... + 55629.

It is an arithmetic number, because the mean of its divisors is an integer number (2161848).

Almost surely, 2^21950874 is an apocalyptic number.

21950874 is an abundant number, since it is smaller than the sum of its proper divisors (29933478).

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

21950874 is a wasteful number, since it uses less digits than its factorization.

21950874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110882 (or 110879 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 21950874 is about 4685.1759838879. The cubic root of 21950874 is about 279.9952125032.

The spelling of 21950874 in words is "twenty-one million, nine hundred fifty thousand, eight hundred seventy-four".