18905390670 has 32 divisors (see below), whose sum is σ = 46050150528. Its totient is φ = 4966191648.

The previous prime is 18905390587. The next prime is 18905390677. The reversal of 18905390670 is 7609350981.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18905390677) 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 15 ways as a sum of consecutive naturals, for example, 4700824 + ... + 4704843.

It is an arithmetic number, because the mean of its divisors is an integer number (1439067204).

Almost surely, 2^18905390670 is an apocalyptic number.

18905390670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18905390670 is an abundant number, since it is smaller than the sum of its proper divisors (27144759858).

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

18905390670 is a wasteful number, since it uses less digits than its factorization.

18905390670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9405744.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 18905390670 in words is "eighteen billion, nine hundred five million, three hundred ninety thousand, six hundred seventy".