18611842402 has 8 divisors (see below), whose sum is σ = 27966149676. Its totient is φ = 9289792512.

The previous prime is 18611842387. The next prime is 18611842421. The reversal of 18611842402 is 20424811681.

It can be written as a sum of positive squares in 2 ways, for example, as 13710302281 + 4901540121 = 117091^2 + 70011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8062903 + ... + 8065210.

Almost surely, 2^18611842402 is an apocalyptic number.

18611842402 is a deficient number, since it is larger than the sum of its proper divisors (9354307274).

18611842402 is a wasteful number, since it uses less digits than its factorization.

18611842402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16128692.

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 18611842402 in words is "eighteen billion, six hundred eleven million, eight hundred forty-two thousand, four hundred two".