20423196 has 36 divisors (see below), whose sum is σ = 51762984. Its totient is φ = 6789600.

The previous prime is 20423177. The next prime is 20423201. The reversal of 20423196 is 69132402.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24466 + ... + 25286.

Almost surely, 2^20423196 is an apocalyptic number.

It is an amenable number.

20423196 is an abundant number, since it is smaller than the sum of its proper divisors (31339788).

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

20423196 is a wasteful number, since it uses less digits than its factorization.

20423196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20423196 is about 4519.2030270834. The cubic root of 20423196 is about 273.3429654878.

Adding to 20423196 its reverse (69132402), we get a palindrome (89555598).

The spelling of 20423196 in words is "twenty million, four hundred twenty-three thousand, one hundred ninety-six".