20738807088647 has 2 divisors, whose sum is σ = 20738807088648. Its totient is φ = 20738807088646.

The previous prime is 20738807088599. The next prime is 20738807088661. The reversal of 20738807088647 is 74688070883702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20738807088647 - 2³⁰ = 20737733346823 is a prime.

It is a super-2 number, since 2×20738807088647² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20738807088847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369403544323 + 10369403544324.

It is an arithmetic number, because the mean of its divisors is an integer number (10369403544324).

Almost surely, 2^{20738807088647} is an apocalyptic number.

20738807088647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20738807088647 is an equidigital number, since it uses as much as digits as its factorization.

20738807088647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 202309632, while the sum is 68.

The spelling of 20738807088647 in words is "twenty trillion, seven hundred thirty-eight billion, eight hundred seven million, eighty-eight thousand, six hundred forty-seven".