18696406 has 4 divisors (see below), whose sum is σ = 28044612. Its totient is φ = 9348202.

The previous prime is 18696397. The next prime is 18696421. The reversal of 18696406 is 60469681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60469681 = 79 ⋅765439.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4674100 + ... + 4674103.

It is an arithmetic number, because the mean of its divisors is an integer number (7011153).

Almost surely, 2^18696406 is an apocalyptic number.

18696406 is a deficient number, since it is larger than the sum of its proper divisors (9348206).

18696406 is an equidigital number, since it uses as much as digits as its factorization.

18696406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9348205.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 18696406 is about 4323.9340883043. The cubic root of 18696406 is about 265.4112801949.

The spelling of 18696406 in words is "eighteen million, six hundred ninety-six thousand, four hundred six".