18855002 has 4 divisors (see below), whose sum is σ = 28282506. Its totient is φ = 9427500.

The previous prime is 18854999. The next prime is 18855013. The reversal of 18855002 is 20055881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20055881 = 337 ⋅59513.

It can be written as a sum of positive squares in only one way, i.e., 9740641 + 9114361 = 3121^2 + 3019^2 .

It is a super-2 number, since 2×18855002² = 711022200840008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4713749 + ... + 4713752.

Almost surely, 2^18855002 is an apocalyptic number.

18855002 is a deficient number, since it is larger than the sum of its proper divisors (9427504).

18855002 is an equidigital number, since it uses as much as digits as its factorization.

18855002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427503.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 18855002 is about 4342.2346781352. The cubic root of 18855002 is about 266.1596362142.

The spelling of 18855002 in words is "eighteen million, eight hundred fifty-five thousand, two".