20433897 has 32 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 12249360.

The previous prime is 20433887. The next prime is 20433943. The reversal of 20433897 is 79833402.

It is not a de Polignac number, because 20433897 - 2⁷ = 20433769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20433857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31458 + ... + 32100.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^20433897 is an apocalyptic number.

20433897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20433897 is a deficient number, since it is larger than the sum of its proper divisors (12951063).

20433897 is a wasteful number, since it uses less digits than its factorization.

20433897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 20433897 is about 4520.3868197312. The cubic root of 20433897 is about 273.3906976898.

The spelling of 20433897 in words is "twenty million, four hundred thirty-three thousand, eight hundred ninety-seven".