18976991047 has 8 divisors (see below), whose sum is σ = 22963754016. Its totient is φ = 15309169152.

The previous prime is 18976991017. The next prime is 18976991107. The reversal of 18976991047 is 74019967981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18976991047 - 2⁷ = 18976990919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18976991017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79735138 + ... + 79735375.

It is an arithmetic number, because the mean of its divisors is an integer number (2870469252).

Almost surely, 2^18976991047 is an apocalyptic number.

18976991047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18976991047 is a deficient number, since it is larger than the sum of its proper divisors (3986762969).

18976991047 is a wasteful number, since it uses less digits than its factorization.

18976991047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159470537.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 18976991047 in words is "eighteen billion, nine hundred seventy-six million, nine hundred ninety-one thousand, forty-seven".