20572446720 has 224 divisors, whose sum is σ = 75234930048. Its totient is φ = 4702076928.

The previous prime is 20572446667. The next prime is 20572446731. The reversal of 20572446720 is 2764427502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 848202 + ... + 872118.

Almost surely, 2^20572446720 is an apocalyptic number.

20572446720 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 20572446720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37617465024).

20572446720 is an abundant number, since it is smaller than the sum of its proper divisors (54662483328).

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

20572446720 is an equidigital number, since it uses as much as digits as its factorization.

20572446720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23958 (or 23934 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 39.

The spelling of 20572446720 in words is "twenty billion, five hundred seventy-two million, four hundred forty-six thousand, seven hundred twenty".