18935897 has 8 divisors (see below), whose sum is σ = 19633536. Its totient is φ = 18248112.

The previous prime is 18935887. The next prime is 18935899. The reversal of 18935897 is 79853981.

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 18935897 - 2⁴ = 18935881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18935899) 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, 1568 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (2454192).

Almost surely, 2^18935897 is an apocalyptic number.

It is an amenable number.

18935897 is a deficient number, since it is larger than the sum of its proper divisors (697639).

18935897 is a wasteful number, since it uses less digits than its factorization.

18935897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4927.

The product of its digits is 544320, while the sum is 50.

The square root of 18935897 is about 4351.5396125969. The cubic root of 18935897 is about 266.5397345558.

The spelling of 18935897 in words is "eighteen million, nine hundred thirty-five thousand, eight hundred ninety-seven".