18973401 has 16 divisors (see below), whose sum is σ = 25826688. Its totient is φ = 12387200.

The previous prime is 18973399. The next prime is 18973421. The reversal of 18973401 is 10437981.

It is a cyclic number.

It is not a de Polignac number, because 18973401 - 2¹ = 18973399 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18973421) 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, 59695 + ... + 60011.

It is an arithmetic number, because the mean of its divisors is an integer number (1614168).

Almost surely, 2^18973401 is an apocalyptic number.

It is an amenable number.

18973401 is a deficient number, since it is larger than the sum of its proper divisors (6853287).

18973401 is a wasteful number, since it uses less digits than its factorization.

18973401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 18973401 is about 4355.8467603900. The cubic root of 18973401 is about 266.7155859906.

The spelling of 18973401 in words is "eighteen million, nine hundred seventy-three thousand, four hundred one".