20017061580 has 48 divisors (see below), whose sum is σ = 57351216384. Its totient is φ = 5213745600.

The previous prime is 20017061549. The next prime is 20017061591. The reversal of 20017061580 is 8516071002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3876696 + ... + 3881855.

It is an arithmetic number, because the mean of its divisors is an integer number (1194817008).

Almost surely, 2^20017061580 is an apocalyptic number.

20017061580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20017061580 is an abundant number, since it is smaller than the sum of its proper divisors (37334154804).

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

20017061580 is a wasteful number, since it uses less digits than its factorization.

20017061580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7758606 (or 7758604 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 20017061580 in words is "twenty billion, seventeen million, sixty-one thousand, five hundred eighty".