20749115937 has 24 divisors (see below), whose sum is σ = 30631210848. Its totient is φ = 12483401920.

The previous prime is 20749115917. The next prime is 20749115963. The reversal of 20749115937 is 73951194702.

It is not a de Polignac number, because 20749115937 - 2¹² = 20749111841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20749115917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158883 + ... + 258344.

It is an arithmetic number, because the mean of its divisors is an integer number (1276300452).

Almost surely, 2^20749115937 is an apocalyptic number.

It is an amenable number.

20749115937 is a deficient number, since it is larger than the sum of its proper divisors (9882094911).

20749115937 is a wasteful number, since it uses less digits than its factorization.

20749115937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417389 (or 417378 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 20749115937 in words is "twenty billion, seven hundred forty-nine million, one hundred fifteen thousand, nine hundred thirty-seven".