20423308 has 12 divisors (see below), whose sum is σ = 36973440. Its totient is φ = 9859472.

The previous prime is 20423257. The next prime is 20423329. The reversal of 20423308 is 80332402.

It is a super-2 number, since 2×20423308² = 834223019325728, which contains 22 as substring.

It is a congruent number.

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, 87916 + ... + 88147.

It is an arithmetic number, because the mean of its divisors is an integer number (3081120).

Almost surely, 2^20423308 is an apocalyptic number.

It is an amenable number.

20423308 is a deficient number, since it is larger than the sum of its proper divisors (16550132).

20423308 is a wasteful number, since it uses less digits than its factorization.

20423308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176096 (or 176094 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20423308 is about 4519.2154186319. The cubic root of 20423308 is about 273.3434651542.

The spelling of 20423308 in words is "twenty million, four hundred twenty-three thousand, three hundred eight".