18494391629390 has 32 divisors (see below), whose sum is σ = 33313027779360. Its totient is φ = 7392619728000.

The previous prime is 18494391629383. The next prime is 18494391629453. The reversal of 18494391629390 is 9392619349481.

It is a super-2 number, since 2×18494391629390² (a number of 27 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 18494391629390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103409945 + ... + 103588635.

It is an arithmetic number, because the mean of its divisors is an integer number (1041032118105).

Almost surely, 2^{18494391629390} is an apocalyptic number.

18494391629390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18494391629390 is a deficient number, since it is larger than the sum of its proper divisors (14818636149970).

18494391629390 is a wasteful number, since it uses less digits than its factorization.

18494391629390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185828.

The product of its (nonzero) digits is 90699264, while the sum is 68.

The spelling of 18494391629390 in words is "eighteen trillion, four hundred ninety-four billion, three hundred ninety-one million, six hundred twenty-nine thousand, three hundred ninety".