20312937 has 10 divisors (see below), whose sum is σ = 30344138. Its totient is φ = 13541904.

The previous prime is 20312923. The next prime is 20312951. The reversal of 20312937 is 73921302.

It is an interprime number because it is at equal distance from previous prime (20312923) and next prime (20312951).

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 385641 = 4464^2 + 621^2 .

It is not a de Polignac number, because 20312937 - 2⁴ = 20312921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312937.

It is not an unprimeable number, because it can be changed into a prime (20312137) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125308 + ... + 125469.

Almost surely, 2^20312937 is an apocalyptic number.

20312937 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20312937 is a deficient number, since it is larger than the sum of its proper divisors (10031201).

20312937 is an equidigital number, since it uses as much as digits as its factorization.

20312937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250789 (or 250780 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20312937 is about 4506.9875748664. The cubic root of 20312937 is about 272.8501774228.

The spelling of 20312937 in words is "twenty million, three hundred twelve thousand, nine hundred thirty-seven".