20011312 has 20 divisors (see below), whose sum is σ = 41053176. Its totient is φ = 9416960.

The previous prime is 20011309. The next prime is 20011319. The reversal of 20011312 is 21311002.

It is a super-2 number, since 2×20011312² = 800905215922688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36514 + ... + 37057.

Almost surely, 2^20011312 is an apocalyptic number.

It is an amenable number.

20011312 is an abundant number, since it is smaller than the sum of its proper divisors (21041864).

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

20011312 is a wasteful number, since it uses less digits than its factorization.

20011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73596 (or 73590 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20011312 is about 4473.4004962668. The cubic root of 20011312 is about 271.4929278343.

Adding to 20011312 its reverse (21311002), we get a palindrome (41322314).

The spelling of 20011312 in words is "twenty million, eleven thousand, three hundred twelve".