18696477 has 4 divisors (see below), whose sum is σ = 24928640. Its totient is φ = 12464316.

The previous prime is 18696463. The next prime is 18696479. The reversal of 18696477 is 77469681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18696477 - 2⁸ = 18696221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18696479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3116077 + ... + 3116082.

It is an arithmetic number, because the mean of its divisors is an integer number (6232160).

Almost surely, 2^18696477 is an apocalyptic number.

It is an amenable number.

18696477 is a deficient number, since it is larger than the sum of its proper divisors (6232163).

18696477 is an equidigital number, since it uses as much as digits as its factorization.

18696477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6232162.

The product of its digits is 508032, while the sum is 48.

The square root of 18696477 is about 4323.9422984124. The cubic root of 18696477 is about 265.4116161628.

The spelling of 18696477 in words is "eighteen million, six hundred ninety-six thousand, four hundred seventy-seven".