18532979 has 4 divisors (see below), whose sum is σ = 18544680. Its totient is φ = 18521280.

The previous prime is 18532939. The next prime is 18532981. The reversal of 18532979 is 97923581.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18532979 - 2¹⁶ = 18467443 is a prime.

It is a super-2 number, since 2×18532979² = 686942621228882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18532919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (4636170).

Almost surely, 2^18532979 is an apocalyptic number.

18532979 is a deficient number, since it is larger than the sum of its proper divisors (11701).

18532979 is an equidigital number, since it uses as much as digits as its factorization.

18532979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11700.

The product of its digits is 136080, while the sum is 44.

The square root of 18532979 is about 4304.9946573718. The cubic root of 18532979 is about 264.6356878286.

The spelling of 18532979 in words is "eighteen million, five hundred thirty-two thousand, nine hundred seventy-nine".