18697387826383 has 16 divisors (see below), whose sum is σ = 21429202443264. Its totient is φ = 15980809793760.

The previous prime is 18697387826371. The next prime is 18697387826389. The reversal of 18697387826383 is 38362878379681.

It is not a de Polignac number, because 18697387826383 - 2³⁷ = 18559948872911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18697387826389) 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, 2850316 + ... + 6746782.

It is an arithmetic number, because the mean of its divisors is an integer number (1339325152704).

Almost surely, 2^{18697387826383} is an apocalyptic number.

18697387826383 is a deficient number, since it is larger than the sum of its proper divisors (2731814616881).

18697387826383 is a wasteful number, since it uses less digits than its factorization.

18697387826383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898422.

The product of its digits is 3511517184, while the sum is 79.

The spelling of 18697387826383 in words is "eighteen trillion, six hundred ninety-seven billion, three hundred eighty-seven million, eight hundred twenty-six thousand, three hundred eighty-three".