18611923152 has 80 divisors (see below), whose sum is σ = 48553336832. Its totient is φ = 6143195520.

The previous prime is 18611923151. The next prime is 18611923207. The reversal of 18611923152 is 25132911681.

It is a self number, because there is not a number n which added to its sum of digits gives 18611923152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18611923151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3478143 + ... + 3483489.

Almost surely, 2^18611923152 is an apocalyptic number.

18611923152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18611923152 is an abundant number, since it is smaller than the sum of its proper divisors (29941413680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18611923152 is a wasteful number, since it uses less digits than its factorization.

18611923152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056 (or 6050 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The spelling of 18611923152 in words is "eighteen billion, six hundred eleven million, nine hundred twenty-three thousand, one hundred fifty-two".