21893496 has 32 divisors (see below), whose sum is σ = 55060560. Its totient is φ = 7254272.

The previous prime is 21893483. The next prime is 21893513. The reversal of 21893496 is 69439812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1516 + ... + 6788.

Almost surely, 2^21893496 is an apocalyptic number.

It is an amenable number.

21893496 is an abundant number, since it is smaller than the sum of its proper divisors (33167064).

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

21893496 is a wasteful number, since it uses less digits than its factorization.

21893496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455 (or 5451 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 21893496 is about 4679.0486212477. The cubic root of 21893496 is about 279.7510372030.

The spelling of 21893496 in words is "twenty-one million, eight hundred ninety-three thousand, four hundred ninety-six".