18906313779 has 24 divisors (see below), whose sum is σ = 27656817552. Its totient is φ = 12443939520.

The previous prime is 18906313763. The next prime is 18906313781. The reversal of 18906313779 is 97731360981.

It is not a de Polignac number, because 18906313779 - 2⁴ = 18906313763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18906313799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1215109 + ... + 1230569.

It is an arithmetic number, because the mean of its divisors is an integer number (1152367398).

Almost surely, 2^18906313779 is an apocalyptic number.

18906313779 is a deficient number, since it is larger than the sum of its proper divisors (8750503773).

18906313779 is a wasteful number, since it uses less digits than its factorization.

18906313779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17187 (or 17184 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 18906313779 in words is "eighteen billion, nine hundred six million, three hundred thirteen thousand, seven hundred seventy-nine".