18943624081830 has 64 divisors (see below), whose sum is σ = 52021585566720. Its totient is φ = 4324810306944.

The previous prime is 18943624081829. The next prime is 18943624081849. The reversal of 18943624081830 is 3818042634981.

It is a happy number.

It is a super-2 number, since 2×18943624081830² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53582889 + ... + 53935268.

It is an arithmetic number, because the mean of its divisors is an integer number (812837274480).

Almost surely, 2^{18943624081830} is an apocalyptic number.

18943624081830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18943624081830 is an abundant number, since it is smaller than the sum of its proper divisors (33077961484890).

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

18943624081830 is a wasteful number, since it uses less digits than its factorization.

18943624081830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107519013.

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 18943624081830 in words is "eighteen trillion, nine hundred forty-three billion, six hundred twenty-four million, eighty-one thousand, eight hundred thirty".