18505636770 has 16 divisors (see below), whose sum is σ = 44413528320. Its totient is φ = 4934836464.

The previous prime is 18505636763. The next prime is 18505636771. The reversal of 18505636770 is 7763650581.

It is not an unprimeable number, because it can be changed into a prime (18505636771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308427250 + ... + 308427309.

It is an arithmetic number, because the mean of its divisors is an integer number (2775845520).

Almost surely, 2^18505636770 is an apocalyptic number.

18505636770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18505636770 is an abundant number, since it is smaller than the sum of its proper divisors (25907891550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18505636770 is a wasteful number, since it uses less digits than its factorization.

18505636770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616854569.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 18505636770 in words is "eighteen billion, five hundred five million, six hundred thirty-six thousand, seven hundred seventy".