20582778120 has 32 divisors (see below), whose sum is σ = 61748334720. Its totient is φ = 5488740800.

The previous prime is 20582778119. The next prime is 20582778149. The reversal of 20582778120 is 2187728502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85761456 + ... + 85761695.

It is an arithmetic number, because the mean of its divisors is an integer number (1929635460).

Almost surely, 2^20582778120 is an apocalyptic number.

20582778120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20582778120 is an abundant number, since it is smaller than the sum of its proper divisors (41165556600).

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

20582778120 is a wasteful number, since it uses less digits than its factorization.

20582778120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171523165 (or 171523161 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 42.

The spelling of 20582778120 in words is "twenty billion, five hundred eighty-two million, seven hundred seventy-eight thousand, one hundred twenty".