18863113920 has 224 divisors, whose sum is σ = 68909184000. Its totient is φ = 4282404864.

The previous prime is 18863113891. The next prime is 18863113921. The reversal of 18863113920 is 2931136881.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (18863113921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 991861 + ... + 1010699.

Almost surely, 2^18863113920 is an apocalyptic number.

18863113920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18863113920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34454592000).

18863113920 is an abundant number, since it is smaller than the sum of its proper divisors (50046070080).

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

18863113920 is a wasteful number, since it uses less digits than its factorization.

18863113920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19015 (or 19005 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 18863113920 in words is "eighteen billion, eight hundred sixty-three million, one hundred thirteen thousand, nine hundred twenty".