1993118980 has 12 divisors (see below), whose sum is σ = 4185549900. Its totient is φ = 797247584.

The previous prime is 1993118971. The next prime is 1993118999. The reversal of 1993118980 is 898113991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1574343684 + 418775296 = 39678^2 + 20464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49827955 + ... + 49827994.

It is an arithmetic number, because the mean of its divisors is an integer number (348795825).

Almost surely, 2^1993118980 is an apocalyptic number.

1993118980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1993118980 is an abundant number, since it is smaller than the sum of its proper divisors (2192430920).

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

1993118980 is a wasteful number, since it uses less digits than its factorization.

1993118980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99655958 (or 99655956 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 49.

The square root of 1993118980 is about 44644.3611220947. The cubic root of 1993118980 is about 1258.4744659717.

The spelling of 1993118980 in words is "one billion, nine hundred ninety-three million, one hundred eighteen thousand, nine hundred eighty".