20107021117 has 8 divisors (see below), whose sum is σ = 20638993752. Its totient is φ = 19581576000.

The previous prime is 20107021097. The next prime is 20107021139. The reversal of 20107021117 is 71112070102.

It can be written as a sum of positive squares in 4 ways, for example, as 3488201721 + 16618819396 = 59061^2 + 128914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20107021117 - 2³¹ = 17959537469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20107021147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625638 + ... + 1637959.

It is an arithmetic number, because the mean of its divisors is an integer number (2579874219).

Almost surely, 2^20107021117 is an apocalyptic number.

It is an amenable number.

20107021117 is a deficient number, since it is larger than the sum of its proper divisors (531972635).

20107021117 is a wasteful number, since it uses less digits than its factorization.

20107021117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263759.

The product of its (nonzero) digits is 196, while the sum is 22.

Adding to 20107021117 its reverse (71112070102), we get a palindrome (91219091219).

The spelling of 20107021117 in words is "twenty billion, one hundred seven million, twenty-one thousand, one hundred seventeen".