20761131863 has 2 divisors, whose sum is σ = 20761131864. Its totient is φ = 20761131862.

The previous prime is 20761131851. The next prime is 20761131893. The reversal of 20761131863 is 36813116702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20761131863 - 2⁸ = 20761131607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20761131893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380565931 + 10380565932.

It is an arithmetic number, because the mean of its divisors is an integer number (10380565932).

Almost surely, 2^20761131863 is an apocalyptic number.

20761131863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20761131863 is an equidigital number, since it uses as much as digits as its factorization.

20761131863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 20761131863 in words is "twenty billion, seven hundred sixty-one million, one hundred thirty-one thousand, eight hundred sixty-three".