20726036569 has 8 divisors (see below), whose sum is σ = 23691129920. Its totient is φ = 17762000976.

The previous prime is 20726036563. The next prime is 20726036579. The reversal of 20726036569 is 96563062702.

It is a happy number.

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 20726036569 - 2¹⁹ = 20725512281 is a prime.

It is a super-2 number, since 2×20726036569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20726036563) 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, 221994 + ... + 301219.

It is an arithmetic number, because the mean of its divisors is an integer number (2961391240).

Almost surely, 2^20726036569 is an apocalyptic number.

It is an amenable number.

20726036569 is a deficient number, since it is larger than the sum of its proper divisors (2965093351).

20726036569 is an equidigital number, since it uses as much as digits as its factorization.

20726036569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528879.

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 20726036569 in words is "twenty billion, seven hundred twenty-six million, thirty-six thousand, five hundred sixty-nine".