21954892 has 12 divisors (see below), whose sum is σ = 38533600. Its totient is φ = 10945296.

The previous prime is 21954869. The next prime is 21954893. The reversal of 21954892 is 29845912.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21954893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6468 + ... + 9259.

Almost surely, 2^21954892 is an apocalyptic number.

It is an amenable number.

21954892 is a deficient number, since it is larger than the sum of its proper divisors (16578708).

21954892 is a wasteful number, since it uses less digits than its factorization.

21954892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16080 (or 16078 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 21954892 is about 4685.6047635284. The cubic root of 21954892 is about 280.0122953784.

The spelling of 21954892 in words is "twenty-one million, nine hundred fifty-four thousand, eight hundred ninety-two".