20701661017 has 8 divisors (see below), whose sum is σ = 20740056480. Its totient is φ = 20663290560.

The previous prime is 20701660963. The next prime is 20701661023. The reversal of 20701661017 is 71016610702.

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 20701661017 - 2²³ = 20693272409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20701661017.

It is not an unprimeable number, because it can be changed into a prime (20701661047) 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, 2564734 + ... + 2572792.

It is an arithmetic number, because the mean of its divisors is an integer number (2592507060).

Almost surely, 2^20701661017 is an apocalyptic number.

It is an amenable number.

20701661017 is a deficient number, since it is larger than the sum of its proper divisors (38395463).

20701661017 is an equidigital number, since it uses as much as digits as its factorization.

20701661017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12503.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 20701661017 in words is "twenty billion, seven hundred one million, six hundred sixty-one thousand, seventeen".