20109123898560 has 168 divisors, whose sum is σ = 72174268838880. Its totient is φ = 5129283760128.

The previous prime is 20109123898541. The next prime is 20109123898613. The reversal of 20109123898560 is 6589832190102.

20109123898560 is a `hidden beast` number, since 20 + 10 + 9 + 12 + 38 + 9 + 8 + 560 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20109123898497 and 20109123898506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151723645 + ... + 151856124.

Almost surely, 2^{20109123898560} is an apocalyptic number.

20109123898560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20109123898560 is an abundant number, since it is smaller than the sum of its proper divisors (52065144940320).

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

20109123898560 is a wasteful number, since it uses less digits than its factorization.

20109123898560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303579815 (or 303579802 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 20109123898560 in words is "twenty trillion, one hundred nine billion, one hundred twenty-three million, eight hundred ninety-eight thousand, five hundred sixty".