20722157115623 has 2 divisors, whose sum is σ = 20722157115624. Its totient is φ = 20722157115622.

The previous prime is 20722157115383. The next prime is 20722157115677. The reversal of 20722157115623 is 32651175122702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20722157115623 - 2¹⁰ = 20722157114599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20722157115683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10361078557811 + 10361078557812.

It is an arithmetic number, because the mean of its divisors is an integer number (10361078557812).

Almost surely, 2^{20722157115623} is an apocalyptic number.

20722157115623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20722157115623 is an equidigital number, since it uses as much as digits as its factorization.

20722157115623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 20722157115623 in words is "twenty trillion, seven hundred twenty-two billion, one hundred fifty-seven million, one hundred fifteen thousand, six hundred twenty-three".