18986625622 has 4 divisors (see below), whose sum is σ = 28479938436. Its totient is φ = 9493312810.

The previous prime is 18986625601. The next prime is 18986625643. The reversal of 18986625622 is 22652668981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22652668981 = 1913 ⋅11841437.

It is an interprime number because it is at equal distance from previous prime (18986625601) and next prime (18986625643).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4746656404 + ... + 4746656407.

It is an arithmetic number, because the mean of its divisors is an integer number (7119984609).

Almost surely, 2^18986625622 is an apocalyptic number.

18986625622 is a deficient number, since it is larger than the sum of its proper divisors (9493312814).

18986625622 is an equidigital number, since it uses as much as digits as its factorization.

18986625622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493312813.

The product of its digits is 4976640, while the sum is 55.

The spelling of 18986625622 in words is "eighteen billion, nine hundred eighty-six million, six hundred twenty-five thousand, six hundred twenty-two".