18706811511457 has 16 divisors (see below), whose sum is σ = 18806235275520. Its totient is φ = 18607663533312.

The previous prime is 18706811511407. The next prime is 18706811511469. The reversal of 18706811511457 is 75411511860781.

It is a cyclic number.

It is not a de Polignac number, because 18706811511457 - 2⁴³ = 9910718489249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18706811511398 and 18706811511407.

It is not an unprimeable number, because it can be changed into a prime (18706811511407) 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, 478550169 + ... + 478589257.

It is an arithmetic number, because the mean of its divisors is an integer number (1175389704720).

Almost surely, 2^{18706811511457} is an apocalyptic number.

It is an amenable number.

18706811511457 is a deficient number, since it is larger than the sum of its proper divisors (99423764063).

18706811511457 is a wasteful number, since it uses less digits than its factorization.

18706811511457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42552.

The product of its (nonzero) digits is 1881600, while the sum is 55.

The spelling of 18706811511457 in words is "eighteen trillion, seven hundred six billion, eight hundred eleven million, five hundred eleven thousand, four hundred fifty-seven".