21892534 has 16 divisors (see below), whose sum is σ = 33542496. Its totient is φ = 10713600.

The previous prime is 21892529. The next prime is 21892601. The reversal of 21892534 is 43529812.

It is a self number, because there is not a number n which added to its sum of digits gives 21892534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37654 + ... + 38230.

It is an arithmetic number, because the mean of its divisors is an integer number (2096406).

Almost surely, 2^21892534 is an apocalyptic number.

21892534 is a deficient number, since it is larger than the sum of its proper divisors (11649962).

21892534 is a wasteful number, since it uses less digits than its factorization.

21892534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951.

The product of its digits is 17280, while the sum is 34.

The square root of 21892534 is about 4678.9458214431. The cubic root of 21892534 is about 279.7469397237.

The spelling of 21892534 in words is "twenty-one million, eight hundred ninety-two thousand, five hundred thirty-four".