18579432947 has 8 divisors (see below), whose sum is σ = 18643439616. Its totient is φ = 18515537352.

The previous prime is 18579432943. The next prime is 18579432973. The reversal of 18579432947 is 74923497581.

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 18579432947 - 2² = 18579432943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18579432943) 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, 314558 + ... + 368924.

It is an arithmetic number, because the mean of its divisors is an integer number (2330429952).

Almost surely, 2^18579432947 is an apocalyptic number.

18579432947 is a deficient number, since it is larger than the sum of its proper divisors (64006669).

18579432947 is an equidigital number, since it uses as much as digits as its factorization.

18579432947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55537.

The product of its digits is 15240960, while the sum is 59.

The spelling of 18579432947 in words is "eighteen billion, five hundred seventy-nine million, four hundred thirty-two thousand, nine hundred forty-seven".