18920256670 has 16 divisors (see below), whose sum is σ = 38921671008. Its totient is φ = 6486945120.

The previous prime is 18920256653. The next prime is 18920256689. The reversal of 18920256670 is 7665202981.

It is a super-2 number, since 2×18920256670² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18920256670.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 135144621 + ... + 135144760.

It is an arithmetic number, because the mean of its divisors is an integer number (2432604438).

Almost surely, 2^18920256670 is an apocalyptic number.

18920256670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18920256670 is an abundant number, since it is smaller than the sum of its proper divisors (20001414338).

18920256670 is a wasteful number, since it uses less digits than its factorization.

18920256670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270289395.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 18920256670 in words is "eighteen billion, nine hundred twenty million, two hundred fifty-six thousand, six hundred seventy".