22721694 has 16 divisors (see below), whose sum is σ = 45641232. Its totient is φ = 7540928.

The previous prime is 22721689. The next prime is 22721717. The reversal of 22721694 is 49612722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6729 + ... + 9524.

It is an arithmetic number, because the mean of its divisors is an integer number (2852577).

Almost surely, 2^22721694 is an apocalyptic number.

22721694 is an abundant number, since it is smaller than the sum of its proper divisors (22919538).

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

22721694 is a wasteful number, since it uses less digits than its factorization.

22721694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16491.

The product of its digits is 12096, while the sum is 33.

The square root of 22721694 is about 4766.7278084657. The cubic root of 22721694 is about 283.2349890138.

The spelling of 22721694 in words is "twenty-two million, seven hundred twenty-one thousand, six hundred ninety-four".