18545424426 has 48 divisors (see below), whose sum is σ = 41782932360. Its totient is φ = 5937684480.

The previous prime is 18545424413. The next prime is 18545424439. The reversal of 18545424426 is 62442454581.

18545424426 is a `hidden beast` number, since 1 + 8 + 545 + 42 + 44 + 26 = 666.

It is an interprime number because it is at equal distance from previous prime (18545424413) and next prime (18545424439).

It can be written as a sum of positive squares in 4 ways, for example, as 16115033025 + 2430391401 = 126945^2 + 49299^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8706 + ... + 192786.

Almost surely, 2^18545424426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18545424426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20891466180).

18545424426 is an abundant number, since it is smaller than the sum of its proper divisors (23237507934).

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

18545424426 is a wasteful number, since it uses less digits than its factorization.

18545424426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184311 (or 184308 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 45.

The spelling of 18545424426 in words is "eighteen billion, five hundred forty-five million, four hundred twenty-four thousand, four hundred twenty-six".