21898024 has 32 divisors (see below), whose sum is σ = 43568640. Its totient is φ = 10296000.

The previous prime is 21898007. The next prime is 21898031. The reversal of 21898024 is 42089812.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

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, 10249 + ... + 12199.

It is an arithmetic number, because the mean of its divisors is an integer number (1361520).

Almost surely, 2^21898024 is an apocalyptic number.

It is an amenable number.

21898024 is a deficient number, since it is larger than the sum of its proper divisors (21670616).

21898024 is a wasteful number, since it uses less digits than its factorization.

21898024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 21898024 is about 4679.5324552780. The cubic root of 21898024 is about 279.7703218554.

The spelling of 21898024 in words is "twenty-one million, eight hundred ninety-eight thousand, twenty-four".