20426782320 has 120 divisors (see below), whose sum is σ = 78399955296. Its totient is φ = 4668977664.

The previous prime is 20426782319. The next prime is 20426782339. The reversal of 20426782320 is 2328762402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 2021427 + ... + 2031506.

Almost surely, 2^20426782320 is an apocalyptic number.

20426782320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20426782320 is an abundant number, since it is smaller than the sum of its proper divisors (57973172976).

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

20426782320 is a wasteful number, since it uses less digits than its factorization.

20426782320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052959 (or 4052950 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 20426782320 in words is "twenty billion, four hundred twenty-six million, seven hundred eighty-two thousand, three hundred twenty".