20312072615 has 32 divisors (see below), whose sum is σ = 25042608000. Its totient is φ = 15812177920.

The previous prime is 20312072611. The next prime is 20312072647. The reversal of 20312072615 is 51627021302.

It is a happy number.

It is not a de Polignac number, because 20312072615 - 2² = 20312072611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312072611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7491110 + ... + 7493820.

It is an arithmetic number, because the mean of its divisors is an integer number (782581500).

Almost surely, 2^20312072615 is an apocalyptic number.

20312072615 is a deficient number, since it is larger than the sum of its proper divisors (4730535385).

20312072615 is a wasteful number, since it uses less digits than its factorization.

20312072615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 20312072615 its reverse (51627021302), we get a palindrome (71939093917).

The spelling of 20312072615 in words is "twenty billion, three hundred twelve million, seventy-two thousand, six hundred fifteen".