18381929192010 has 48 divisors (see below), whose sum is σ = 47802364448904. Its totient is φ = 4900888958976.

The previous prime is 18381929191991. The next prime is 18381929192059. The reversal of 18381929192010 is 1029192918381.

It is a happy number.

18381929192010 is a `hidden beast` number, since 1 + 8 + 381 + 92 + 91 + 92 + 0 + 1 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7096784112441 + 11285145079569 = 2663979^2 + 3359337^2 .

It is a super-2 number, since 2×18381929192010² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19512807 + ... + 20433146.

Almost surely, 2^{18381929192010} is an apocalyptic number.

18381929192010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18381929192010 is an abundant number, since it is smaller than the sum of its proper divisors (29420435256894).

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

18381929192010 is a wasteful number, since it uses less digits than its factorization.

18381929192010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39951079 (or 39951076 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 54.

The spelling of 18381929192010 in words is "eighteen trillion, three hundred eighty-one billion, nine hundred twenty-nine million, one hundred ninety-two thousand, ten".