18855914957 has 16 divisors (see below), whose sum is σ = 21094266240. Its totient is φ = 16710355200.

The previous prime is 18855914929. The next prime is 18855914969. The reversal of 18855914957 is 75941955881.

It is not a de Polignac number, because 18855914957 - 2¹⁴ = 18855898573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18855914957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18855914977) 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, 66128 + ... + 205145.

It is an arithmetic number, because the mean of its divisors is an integer number (1318391640).

Almost surely, 2^18855914957 is an apocalyptic number.

It is an amenable number.

18855914957 is a deficient number, since it is larger than the sum of its proper divisors (2238351283).

18855914957 is a wasteful number, since it uses less digits than its factorization.

18855914957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271444.

The product of its digits is 18144000, while the sum is 62.

The spelling of 18855914957 in words is "eighteen billion, eight hundred fifty-five million, nine hundred fourteen thousand, nine hundred fifty-seven".