20845254580 has 24 divisors (see below), whose sum is σ = 43945376328. Its totient is φ = 8305655808.

The previous prime is 20845254571. The next prime is 20845254593. The reversal of 20845254580 is 8545254802.

It can be written as a sum of positive squares in 4 ways, for example, as 3407523876 + 17437730704 = 58374^2 + 132052^2 .

It is a super-3 number, since 3×20845254580³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2022609 + ... + 2032888.

It is an arithmetic number, because the mean of its divisors is an integer number (1831057347).

Almost surely, 2^20845254580 is an apocalyptic number.

20845254580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20845254580 is an abundant number, since it is smaller than the sum of its proper divisors (23100121748).

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

20845254580 is a wasteful number, since it uses less digits than its factorization.

20845254580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055763 (or 4055761 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 43.

The spelling of 20845254580 in words is "twenty billion, eight hundred forty-five million, two hundred fifty-four thousand, five hundred eighty".