20120717100 has 72 divisors (see below), whose sum is σ = 63508310208. Its totient is φ = 4877748800.

The previous prime is 20120717093. The next prime is 20120717129. The reversal of 20120717100 is 171702102.

It is a happy number.

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, 3045294 + ... + 3051893.

It is an arithmetic number, because the mean of its divisors is an integer number (882059864).

Almost surely, 2^20120717100 is an apocalyptic number.

20120717100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120717100 is an abundant number, since it is smaller than the sum of its proper divisors (43387593108).

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

20120717100 is a wasteful number, since it uses less digits than its factorization.

20120717100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097215 (or 6097208 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 21.

The spelling of 20120717100 in words is "twenty billion, one hundred twenty million, seven hundred seventeen thousand, one hundred".