10191720708 has 72 divisors (see below), whose sum is σ = 27756846936. Its totient is φ = 3134476800.

The previous prime is 10191720667. The next prime is 10191720709. The reversal of 10191720708 is 80702719101.

It can be written as a sum of positive squares in 4 ways, for example, as 2345658624 + 7846062084 = 48432^2 + 88578^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (10191720709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1504048 + ... + 1510808.

It is an arithmetic number, because the mean of its divisors is an integer number (385511763).

Almost surely, 2^10191720708 is an apocalyptic number.

10191720708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

10191720708 is an abundant number, since it is smaller than the sum of its proper divisors (17565126228).

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

10191720708 is a wasteful number, since it uses less digits than its factorization.

10191720708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005 (or 10000 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The spelling of 10191720708 in words is "ten billion, one hundred ninety-one million, seven hundred twenty thousand, seven hundred eight".