18545070400 has 42 divisors (see below), whose sum is σ = 45632467790. Its totient is φ = 7418027520.

The previous prime is 18545070373. The next prime is 18545070451. The reversal of 18545070400 is 407054581.

It can be written as a sum of positive squares in 3 ways, for example, as 4064317504 + 14480752896 = 63752^2 + 120336^2 .

It is a super-2 number, since 2×18545070400² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5793735 + ... + 5796934.

Almost surely, 2^18545070400 is an apocalyptic number.

18545070400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18545070400 is an abundant number, since it is smaller than the sum of its proper divisors (27087397390).

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

18545070400 is a wasteful number, since it uses less digits than its factorization.

18545070400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11590691 (or 11590676 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The spelling of 18545070400 in words is "eighteen billion, five hundred forty-five million, seventy thousand, four hundred".