18948977 has 8 divisors (see below), whose sum is σ = 19880640. Its totient is φ = 18035920.

The previous prime is 18948973. The next prime is 18948991. The reversal of 18948977 is 77984981.

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 18948977 - 2² = 18948973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18948973) 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, 2543 + ... + 6660.

It is an arithmetic number, because the mean of its divisors is an integer number (2485080).

Almost surely, 2^18948977 is an apocalyptic number.

It is an amenable number.

18948977 is a deficient number, since it is larger than the sum of its proper divisors (931663).

18948977 is an equidigital number, since it uses as much as digits as its factorization.

18948977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303.

The product of its digits is 1016064, while the sum is 53.

The square root of 18948977 is about 4353.0422694938. The cubic root of 18948977 is about 266.6010913411.

The spelling of 18948977 in words is "eighteen million, nine hundred forty-eight thousand, nine hundred seventy-seven".