20339948580 has 384 divisors, whose sum is σ = 69662208000. Its totient is φ = 4337141760.

The previous prime is 20339948513. The next prime is 20339948599. The reversal of 20339948580 is 8584993302.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40761171 + ... + 40761669.

It is an arithmetic number, because the mean of its divisors is an integer number (181412000).

Almost surely, 2^20339948580 is an apocalyptic number.

20339948580 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 20339948580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34831104000).

20339948580 is an abundant number, since it is smaller than the sum of its proper divisors (49322259420).

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

20339948580 is a wasteful number, since it uses less digits than its factorization.

20339948580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 20339948580 in words is "twenty billion, three hundred thirty-nine million, nine hundred forty-eight thousand, five hundred eighty".