20899344 has 20 divisors (see below), whose sum is σ = 53990096. Its totient is φ = 6966432.

The previous prime is 20899327. The next prime is 20899367. The reversal of 20899344 is 44399802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217654 + ... + 217749.

Almost surely, 2^20899344 is an apocalyptic number.

20899344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20899344 is an abundant number, since it is smaller than the sum of its proper divisors (33090752).

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

20899344 is a wasteful number, since it uses less digits than its factorization.

20899344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435414 (or 435408 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20899344 is about 4571.5800332051. The cubic root of 20899344 is about 275.4509142317.

The spelling of 20899344 in words is "twenty million, eight hundred ninety-nine thousand, three hundred forty-four".