18993059379 has 48 divisors (see below), whose sum is σ = 33214484160. Its totient is φ = 10209669120.

The previous prime is 18993059377. The next prime is 18993059387. The reversal of 18993059379 is 97395039981.

18993059379 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 30 + 593 + 7 + 9 = 666.

It is not a de Polignac number, because 18993059379 - 2¹ = 18993059377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18993059377) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3305449 + ... + 3311189.

It is an arithmetic number, because the mean of its divisors is an integer number (691968420).

Almost surely, 2^18993059379 is an apocalyptic number.

18993059379 is a deficient number, since it is larger than the sum of its proper divisors (14221424781).

18993059379 is a wasteful number, since it uses less digits than its factorization.

18993059379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860 (or 8857 counting only the distinct ones).

The product of its (nonzero) digits is 16533720, while the sum is 63.

The spelling of 18993059379 in words is "eighteen billion, nine hundred ninety-three million, fifty-nine thousand, three hundred seventy-nine".