20422060640 has 96 divisors (see below), whose sum is σ = 51573122496. Its totient is φ = 7623024640.

The previous prime is 20422060621. The next prime is 20422060651. The reversal of 20422060640 is 4606022402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83204 + ... + 218556.

It is an arithmetic number, because the mean of its divisors is an integer number (537220026).

Almost surely, 2^20422060640 is an apocalyptic number.

20422060640 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 20422060640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25786561248).

20422060640 is an abundant number, since it is smaller than the sum of its proper divisors (31151061856).

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

20422060640 is a wasteful number, since it uses less digits than its factorization.

20422060640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135432 (or 135424 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The spelling of 20422060640 in words is "twenty billion, four hundred twenty-two million, sixty thousand, six hundred forty".