21897483 has 8 divisors (see below), whose sum is σ = 29275200. Its totient is φ = 14559048.

The previous prime is 21897433. The next prime is 21897493. The reversal of 21897483 is 38479812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21897483 - 2¹² = 21893387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21897433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8493 + ... + 10766.

It is an arithmetic number, because the mean of its divisors is an integer number (3659400).

Almost surely, 2^21897483 is an apocalyptic number.

21897483 is a deficient number, since it is larger than the sum of its proper divisors (7377717).

21897483 is a wasteful number, since it uses less digits than its factorization.

21897483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19641.

The product of its digits is 96768, while the sum is 42.

The square root of 21897483 is about 4679.4746500008. The cubic root of 21897483 is about 279.7680178882.

The spelling of 21897483 in words is "twenty-one million, eight hundred ninety-seven thousand, four hundred eighty-three".