20374818857 has 8 divisors (see below), whose sum is σ = 20445384960. Its totient is φ = 20304285760.

The previous prime is 20374818773. The next prime is 20374818859. The reversal of 20374818857 is 75881847302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20374818857 - 2²⁶ = 20307709993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20374818799 and 20374818808.

It is not an unprimeable number, because it can be changed into a prime (20374818859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2458673 + ... + 2466945.

It is an arithmetic number, because the mean of its divisors is an integer number (2555673120).

Almost surely, 2^20374818857 is an apocalyptic number.

It is an amenable number.

20374818857 is a deficient number, since it is larger than the sum of its proper divisors (70566103).

20374818857 is an equidigital number, since it uses as much as digits as its factorization.

20374818857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16503.

The product of its (nonzero) digits is 3010560, while the sum is 53.

The spelling of 20374818857 in words is "twenty billion, three hundred seventy-four million, eight hundred eighteen thousand, eight hundred fifty-seven".