20239212 has 24 divisors (see below), whose sum is σ = 53971456. Its totient is φ = 5782608.

The previous prime is 20239181. The next prime is 20239253. The reversal of 20239212 is 21293202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120388 + ... + 120555.

Almost surely, 2^20239212 is an apocalyptic number.

It is an amenable number.

20239212 is an abundant number, since it is smaller than the sum of its proper divisors (33732244).

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

20239212 is a wasteful number, since it uses less digits than its factorization.

20239212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240957 (or 240955 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20239212 is about 4498.8011736462. The cubic root of 20239212 is about 272.5196776184.

The spelling of 20239212 in words is "twenty million, two hundred thirty-nine thousand, two hundred twelve".