20425375780 has 24 divisors (see below), whose sum is σ = 43130276280. Its totient is φ = 8125009920.

The previous prime is 20425375741. The next prime is 20425375799. The reversal of 20425375780 is 8757352402.

It can be written as a sum of positive squares in 4 ways, for example, as 413878336 + 20011497444 = 20344^2 + 141462^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2817565 + ... + 2824804.

It is an arithmetic number, because the mean of its divisors is an integer number (1797094845).

Almost surely, 2^20425375780 is an apocalyptic number.

20425375780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20425375780 is an abundant number, since it is smaller than the sum of its proper divisors (22704900500).

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

20425375780 is a wasteful number, since it uses less digits than its factorization.

20425375780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642559 (or 5642557 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 20425375780 in words is "twenty billion, four hundred twenty-five million, three hundred seventy-five thousand, seven hundred eighty".