20051312 has 20 divisors (see below), whose sum is σ = 38929800. Its totient is φ = 10004928.

The previous prime is 20051309. The next prime is 20051329. The reversal of 20051312 is 21315002.

It is a happy number.

It is a super-2 number, since 2×20051312² = 804110225842688, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9314 + ... + 11262.

It is an arithmetic number, because the mean of its divisors is an integer number (1946490).

Almost surely, 2^20051312 is an apocalyptic number.

It is an amenable number.

20051312 is a deficient number, since it is larger than the sum of its proper divisors (18878488).

20051312 is a wasteful number, since it uses less digits than its factorization.

20051312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600 (or 2594 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20051312 is about 4477.8691360959. The cubic root of 20051312 is about 271.6737004130.

Adding to 20051312 its reverse (21315002), we get a palindrome (41366314).

The spelling of 20051312 in words is "twenty million, fifty-one thousand, three hundred twelve".