18979011 has 12 divisors (see below), whose sum is σ = 27686880. Its totient is φ = 12526800.

The previous prime is 18979003. The next prime is 18979013. The reversal of 18979011 is 11097981.

It is not a de Polignac number, because 18979011 - 2³ = 18979003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18979013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9531 + ... + 11348.

It is an arithmetic number, because the mean of its divisors is an integer number (2307240).

Almost surely, 2^18979011 is an apocalyptic number.

18979011 is a deficient number, since it is larger than the sum of its proper divisors (8707869).

18979011 is a wasteful number, since it uses less digits than its factorization.

18979011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20986 (or 20983 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 18979011 is about 4356.4906748437. The cubic root of 18979011 is about 266.7418706296.

The spelling of 18979011 in words is "eighteen million, nine hundred seventy-nine thousand, eleven".