18868802 has 4 divisors (see below), whose sum is σ = 28303206. Its totient is φ = 9434400.

The previous prime is 18868789. The next prime is 18868807. The reversal of 18868802 is 20886881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20886881 = 373 ⋅55997.

It can be written as a sum of positive squares in only one way, i.e., 13756681 + 5112121 = 3709^2 + 2261^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18868802.

It is not an unprimeable number, because it can be changed into a prime (18868807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4717199 + ... + 4717202.

Almost surely, 2^18868802 is an apocalyptic number.

18868802 is a deficient number, since it is larger than the sum of its proper divisors (9434404).

18868802 is an equidigital number, since it uses as much as digits as its factorization.

18868802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9434403.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 18868802 is about 4343.8234310340. The cubic root of 18868802 is about 266.2245545712.

The spelling of 18868802 in words is "eighteen million, eight hundred sixty-eight thousand, eight hundred two".