18974853 has 6 divisors (see below), whose sum is σ = 27408134. Its totient is φ = 12649896.

The previous prime is 18974833. The next prime is 18974881. The reversal of 18974853 is 35847981.

It can be written as a sum of positive squares in only one way, i.e., 18948609 + 26244 = 4353^2 + 162^2 .

It is not a de Polignac number, because 18974853 - 2¹⁸ = 18712709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18974799 and 18974808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1054150 + ... + 1054167.

Almost surely, 2^18974853 is an apocalyptic number.

It is an amenable number.

18974853 is a deficient number, since it is larger than the sum of its proper divisors (8433281).

18974853 is a wasteful number, since it uses less digits than its factorization.

18974853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108323 (or 2108320 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18974853 is about 4356.0134297314. The cubic root of 18974853 is about 266.7223895706.

The spelling of 18974853 in words is "eighteen million, nine hundred seventy-four thousand, eight hundred fifty-three".