20045555712 has 1152 divisors, whose sum is σ = 81564537600. Its totient is φ = 4586471424.

The previous prime is 20045555683. The next prime is 20045555753. The reversal of 20045555712 is 21755554002.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 541771758 + ... + 541771794.

It is an arithmetic number, because the mean of its divisors is an integer number (70802550).

Almost surely, 2^20045555712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20045555712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40782268800).

20045555712 is an abundant number, since it is smaller than the sum of its proper divisors (61518981888).

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

20045555712 is a wasteful number, since it uses less digits than its factorization.

20045555712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 36.

The spelling of 20045555712 in words is "twenty billion, forty-five million, five hundred fifty-five thousand, seven hundred twelve".