20455158960 has 320 divisors, whose sum is σ = 71905397760. Its totient is φ = 5343528960.

The previous prime is 20455158959. The next prime is 20455158989. The reversal of 20455158960 is 6985155402.

20455158960 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 5 + 1 + 589 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40666069 + ... + 40666571.

It is an arithmetic number, because the mean of its divisors is an integer number (224704368).

Almost surely, 2^20455158960 is an apocalyptic number.

20455158960 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 20455158960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35952698880).

20455158960 is an abundant number, since it is smaller than the sum of its proper divisors (51450238800).

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

20455158960 is a wasteful number, since it uses less digits than its factorization.

20455158960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 20455158960 in words is "twenty billion, four hundred fifty-five million, one hundred fifty-eight thousand, nine hundred sixty".