18168944530 has 64 divisors (see below), whose sum is σ = 37298112768. Its totient is φ = 6307797760.

The previous prime is 18168944527. The next prime is 18168944557. The reversal of 18168944530 is 3544986181.

18168944530 = 8348² + 8349² + ... + 8600².

It is a happy number.

It is a super-2 number, since 2×18168944530² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1402764 + ... + 1415656.

It is an arithmetic number, because the mean of its divisors is an integer number (582783012).

Almost surely, 2^18168944530 is an apocalyptic number.

18168944530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18168944530 is an abundant number, since it is smaller than the sum of its proper divisors (19129168238).

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

18168944530 is a wasteful number, since it uses less digits than its factorization.

18168944530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13491.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 18168944530 in words is "eighteen billion, one hundred sixty-eight million, nine hundred forty-four thousand, five hundred thirty".