18620379705 has 32 divisors (see below), whose sum is σ = 30282660864. Its totient is φ = 9767964096.

The previous prime is 18620379691. The next prime is 18620379751. The reversal of 18620379705 is 50797302681.

It is not a de Polignac number, because 18620379705 - 2⁷ = 18620379577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672852 + ... + 699978.

It is an arithmetic number, because the mean of its divisors is an integer number (946333152).

Almost surely, 2^18620379705 is an apocalyptic number.

18620379705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18620379705 is a deficient number, since it is larger than the sum of its proper divisors (11662281159).

18620379705 is a wasteful number, since it uses less digits than its factorization.

18620379705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27885.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 18620379705 in words is "eighteen billion, six hundred twenty million, three hundred seventy-nine thousand, seven hundred five".