20312012215 has 16 divisors (see below), whose sum is σ = 26593339680. Its totient is φ = 14770667520.

The previous prime is 20312012213. The next prime is 20312012251. The reversal of 20312012215 is 51221021302.

It is not a de Polignac number, because 20312012215 - 2¹ = 20312012213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20312012192 and 20312012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312012213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650071 + ... + 680599.

It is an arithmetic number, because the mean of its divisors is an integer number (1662083730).

Almost surely, 2^20312012215 is an apocalyptic number.

20312012215 is a deficient number, since it is larger than the sum of its proper divisors (6281327465).

20312012215 is a wasteful number, since it uses less digits than its factorization.

20312012215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42642.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20312012215 its reverse (51221021302), we get a palindrome (71533033517).

The spelling of 20312012215 in words is "twenty billion, three hundred twelve million, twelve thousand, two hundred fifteen".