18269977 has 8 divisors (see below), whose sum is σ = 20034432. Its totient is φ = 16522800.

The previous prime is 18269957. The next prime is 18270013. The reversal of 18269977 is 77996281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18269977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18269977.

It is not an unprimeable number, because it can be changed into a prime (18269947) 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, 2049 + ... + 6382.

It is an arithmetic number, because the mean of its divisors is an integer number (2504304).

Almost surely, 2^18269977 is an apocalyptic number.

It is an amenable number.

18269977 is a deficient number, since it is larger than the sum of its proper divisors (1764455).

18269977 is a wasteful number, since it uses less digits than its factorization.

18269977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8639.

The product of its digits is 381024, while the sum is 49.

The square root of 18269977 is about 4274.3393641591. The cubic root of 18269977 is about 263.3779018015.

The spelling of 18269977 in words is "eighteen million, two hundred sixty-nine thousand, nine hundred seventy-seven".