20374647291 has 12 divisors (see below), whose sum is σ = 30225453232. Its totient is φ = 13215987216.

The previous prime is 20374647277. The next prime is 20374647323. The reversal of 20374647291 is 19274647302.

20374647291 is a `hidden beast` number, since 2 + 0 + 37 + 464 + 72 + 91 = 666.

It is not a de Polignac number, because 20374647291 - 2¹⁸ = 20374385147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20374647691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30592231 + ... + 30592896.

Almost surely, 2^20374647291 is an apocalyptic number.

20374647291 is a deficient number, since it is larger than the sum of its proper divisors (9850805941).

20374647291 is a wasteful number, since it uses less digits than its factorization.

20374647291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61185170 (or 61185167 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 20374647291 in words is "twenty billion, three hundred seventy-four million, six hundred forty-seven thousand, two hundred ninety-one".