21953892 has 24 divisors (see below), whose sum is σ = 53922400. Its totient is φ = 6932736.

The previous prime is 21953881. The next prime is 21953903. The reversal of 21953892 is 29835912.

It is an interprime number because it is at equal distance from previous prime (21953881) and next prime (21953903).

It is a self number, because there is not a number n which added to its sum of digits gives 21953892.

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, 47917 + ... + 48372.

Almost surely, 2^21953892 is an apocalyptic number.

It is an amenable number.

21953892 is an abundant number, since it is smaller than the sum of its proper divisors (31968508).

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

21953892 is a wasteful number, since it uses less digits than its factorization.

21953892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96315 (or 96313 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 21953892 is about 4685.4980525020. The cubic root of 21953892 is about 280.0080439866.

The spelling of 21953892 in words is "twenty-one million, nine hundred fifty-three thousand, eight hundred ninety-two".