21824998 has 16 divisors (see below), whose sum is σ = 35471520. Its totient is φ = 10071048.

The previous prime is 21824987. The next prime is 21825017. The reversal of 21824998 is 89942812.

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, 1911 + ... + 6877.

It is an arithmetic number, because the mean of its divisors is an integer number (2216970).

Almost surely, 2^21824998 is an apocalyptic number.

21824998 is a deficient number, since it is larger than the sum of its proper divisors (13646522).

21824998 is an equidigital number, since it uses as much as digits as its factorization.

21824998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008 (or 4982 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 21824998 is about 4671.7232366655. The cubic root of 21824998 is about 279.4589808201.

It can be divided in two parts, 21824 and 998, that added together give a palindrome (22822).

The spelling of 21824998 in words is "twenty-one million, eight hundred twenty-four thousand, nine hundred ninety-eight".