20648330161580 has 48 divisors (see below), whose sum is σ = 48581918846496. Its totient is φ = 7305551700480.

The previous prime is 20648330161577. The next prime is 20648330161649. The reversal of 20648330161580 is 8516103384602.

It is a super-2 number, since 2×20648330161580² (a number of 27 digits) contains 22 as substring.

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, 1268316809 + ... + 1268333088.

It is an arithmetic number, because the mean of its divisors is an integer number (1012123309302).

Almost surely, 2^{20648330161580} is an apocalyptic number.

20648330161580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20648330161580 is an abundant number, since it is smaller than the sum of its proper divisors (27933588684916).

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

20648330161580 is a wasteful number, since it uses less digits than its factorization.

20648330161580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536649954 (or 2536649952 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 20648330161580 in words is "twenty trillion, six hundred forty-eight billion, three hundred thirty million, one hundred sixty-one thousand, five hundred eighty".