18902453 has 12 divisors (see below), whose sum is σ = 20399940. Its totient is φ = 17452800.

The previous prime is 18902441. The next prime is 18902459. The reversal of 18902453 is 35420981.

It can be written as a sum of positive squares in 6 ways, for example, as 10387729 + 8514724 = 3223^2 + 2918^2 .

It is not a de Polignac number, because 18902453 - 2⁴ = 18902437 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 (18902459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173363 + ... + 173471.

It is an arithmetic number, because the mean of its divisors is an integer number (1699995).

Almost surely, 2^18902453 is an apocalyptic number.

It is an amenable number.

18902453 is a deficient number, since it is larger than the sum of its proper divisors (1497487).

18902453 is a wasteful number, since it uses less digits than its factorization.

18902453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18902453 is about 4347.6951365062. The cubic root of 18902453 is about 266.3827239847.

The spelling of 18902453 in words is "eighteen million, nine hundred two thousand, four hundred fifty-three".