20395514580 has 96 divisors (see below), whose sum is σ = 65377622016. Its totient is φ = 4653833856.

The previous prime is 20395514561. The next prime is 20395514591. The reversal of 20395514580 is 8541559302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205177 + ... + 287903.

It is an arithmetic number, because the mean of its divisors is an integer number (681016896).

Almost surely, 2^20395514580 is an apocalyptic number.

20395514580 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 20395514580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32688811008).

20395514580 is an abundant number, since it is smaller than the sum of its proper divisors (44982107436).

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

20395514580 is a wasteful number, since it uses less digits than its factorization.

20395514580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83333 (or 83331 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 20395514580 in words is "twenty billion, three hundred ninety-five million, five hundred fourteen thousand, five hundred eighty".