20445537200 has 120 divisors (see below), whose sum is σ = 55915992576. Its totient is φ = 7111456000.

The previous prime is 20445537173. The next prime is 20445537253. The reversal of 20445537200 is 273554402.

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, 185 + ... + 202215.

Almost surely, 2^20445537200 is an apocalyptic number.

20445537200 is a gapful number since it is divisible by the number (20) 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 20445537200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27957996288).

20445537200 is an abundant number, since it is smaller than the sum of its proper divisors (35470455376).

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

20445537200 is a wasteful number, since it uses less digits than its factorization.

20445537200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202083 (or 202072 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 32.

The spelling of 20445537200 in words is "twenty billion, four hundred forty-five million, five hundred thirty-seven thousand, two hundred".