18913802 has 4 divisors (see below), whose sum is σ = 28370706. Its totient is φ = 9456900.

The previous prime is 18913799. The next prime is 18913819. The reversal of 18913802 is 20831981.

It is a Cunningham number, because it is equal to 4349²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18913801 + 1 = 4349^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4728449 + ... + 4728452.

Almost surely, 2^18913802 is an apocalyptic number.

18913802 is a deficient number, since it is larger than the sum of its proper divisors (9456904).

18913802 is an equidigital number, since it uses as much as digits as its factorization.

18913802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456903.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18913802 is about 4349.0001149690. Note that the first 3 decimals coincide. The cubic root of 18913802 is about 266.4360252273.

The spelling of 18913802 in words is "eighteen million, nine hundred thirteen thousand, eight hundred two".