20570892220 has 48 divisors (see below), whose sum is σ = 44475540480. Its totient is φ = 7986276864.

The previous prime is 20570892197. The next prime is 20570892227. The reversal of 20570892220 is 2229807502.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 20570892220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570892227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268677 + ... + 336643.

It is an arithmetic number, because the mean of its divisors is an integer number (926573760).

Almost surely, 2^20570892220 is an apocalyptic number.

20570892220 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 20570892220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22237770240).

20570892220 is an abundant number, since it is smaller than the sum of its proper divisors (23904648260).

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

20570892220 is a wasteful number, since it uses less digits than its factorization.

20570892220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68422 (or 68420 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 20570892220 in words is "twenty billion, five hundred seventy million, eight hundred ninety-two thousand, two hundred twenty".