18946472562 has 128 divisors (see below), whose sum is σ = 46125676800. Its totient is φ = 5740305408.

The previous prime is 18946472561. The next prime is 18946472569. The reversal of 18946472562 is 26527464981.

18946472562 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 6 + 4 + 72 + 562 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 18946472499 and 18946472508.

It is not an unprimeable number, because it can be changed into a prime (18946472561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4719268 + ... + 4723280.

It is an arithmetic number, because the mean of its divisors is an integer number (360356850).

Almost surely, 2^18946472562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18946472562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23062838400).

18946472562 is an abundant number, since it is smaller than the sum of its proper divisors (27179204238).

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

18946472562 is a wasteful number, since it uses less digits than its factorization.

18946472562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217 (or 4211 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 18946472562 in words is "eighteen billion, nine hundred forty-six million, four hundred seventy-two thousand, five hundred sixty-two".