18490977 has 16 divisors (see below), whose sum is σ = 27744000. Its totient is φ = 12169872.

The previous prime is 18490961. The next prime is 18490987. The reversal of 18490977 is 77909481.

It is not a de Polignac number, because 18490977 - 2⁴ = 18490961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18490987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (1734000).

Almost surely, 2^18490977 is an apocalyptic number.

It is an amenable number.

18490977 is a deficient number, since it is larger than the sum of its proper divisors (9253023).

18490977 is an equidigital number, since it uses as much as digits as its factorization.

18490977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757 (or 8751 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 18490977 is about 4300.1136031505. The cubic root of 18490977 is about 264.4356186131.

The spelling of 18490977 in words is "eighteen million, four hundred ninety thousand, nine hundred seventy-seven".