20562288240 has 320 divisors, whose sum is σ = 71720409600. Its totient is φ = 4839616512.

The previous prime is 20562288223. The next prime is 20562288287. The reversal of 20562288240 is 4288226502.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 6809451 + ... + 6812469.

It is an arithmetic number, because the mean of its divisors is an integer number (224126280).

Almost surely, 2^20562288240 is an apocalyptic number.

20562288240 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 20562288240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35860204800).

20562288240 is an abundant number, since it is smaller than the sum of its proper divisors (51158121360).

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

20562288240 is a wasteful number, since it uses less digits than its factorization.

20562288240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144 (or 3138 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The spelling of 20562288240 in words is "twenty billion, five hundred sixty-two million, two hundred eighty-eight thousand, two hundred forty".