20045504000 has 80 divisors (see below), whose sum is σ = 49984876656. Its totient is φ = 8018176000.

The previous prime is 20045503997. The next prime is 20045504027. The reversal of 20045504000 is 40554002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20045504000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92606 + ... + 220605.

Almost surely, 2^20045504000 is an apocalyptic number.

20045504000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045504000 is an abundant number, since it is smaller than the sum of its proper divisors (29939372656).

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

20045504000 is an frugal number, since it uses more digits than its factorization.

20045504000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313244 (or 313218 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The spelling of 20045504000 in words is "twenty billion, forty-five million, five hundred four thousand".