18572085840 has 240 divisors, whose sum is σ = 73062198720. Its totient is φ = 3859107840.

The previous prime is 18572085821. The next prime is 18572085841. The reversal of 18572085840 is 4858027581.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18572085840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18572085841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57576 + ... + 201144.

It is an arithmetic number, because the mean of its divisors is an integer number (304425828).

Almost surely, 2^18572085840 is an apocalyptic number.

18572085840 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 18572085840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36531099360).

18572085840 is an abundant number, since it is smaller than the sum of its proper divisors (54490112880).

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

18572085840 is a wasteful number, since it uses less digits than its factorization.

18572085840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143610 (or 143597 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 18572085840 in words is "eighteen billion, five hundred seventy-two million, eighty-five thousand, eight hundred forty".