20231812 has 12 divisors (see below), whose sum is σ = 36945216. Its totient is φ = 9676040.

The previous prime is 20231807. The next prime is 20231839. The reversal of 20231812 is 21813202.

It is a self number, because there is not a number n which added to its sum of digits gives 20231812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109864 + ... + 110047.

It is an arithmetic number, because the mean of its divisors is an integer number (3078768).

Almost surely, 2^20231812 is an apocalyptic number.

It is an amenable number.

20231812 is a deficient number, since it is larger than the sum of its proper divisors (16713404).

20231812 is a wasteful number, since it uses less digits than its factorization.

20231812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219938 (or 219936 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20231812 is about 4497.9786571303. The cubic root of 20231812 is about 272.4864600629.

Adding to 20231812 its product of nonzero digits (192), we get a square (20232004 = 4498²).

The spelling of 20231812 in words is "twenty million, two hundred thirty-one thousand, eight hundred twelve".