18786307400123 has 16 divisors (see below), whose sum is σ = 19759003681536. Its totient is φ = 17836556574720.

The previous prime is 18786307400111. The next prime is 18786307400131. The reversal of 18786307400123 is 32100470368781.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18786307400123 - 2⁴² = 14388260889019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18786307400143) 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, 43186715 + ... + 43619547.

It is an arithmetic number, because the mean of its divisors is an integer number (1234937730096).

Almost surely, 2^{18786307400123} is an apocalyptic number.

18786307400123 is a deficient number, since it is larger than the sum of its proper divisors (972696281413).

18786307400123 is a wasteful number, since it uses less digits than its factorization.

18786307400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459334.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 18786307400123 in words is "eighteen trillion, seven hundred eighty-six billion, three hundred seven million, four hundred thousand, one hundred twenty-three".