20013653426731 has 2 divisors, whose sum is σ = 20013653426732. Its totient is φ = 20013653426730.

The previous prime is 20013653426647. The next prime is 20013653426749. The reversal of 20013653426731 is 13762435631002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20013653426731 - 2⁹ = 20013653426219 is a prime.

It is a super-2 number, since 2×20013653426731² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20013653436731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006826713365 + 10006826713366.

It is an arithmetic number, because the mean of its divisors is an integer number (10006826713366).

Almost surely, 2^{20013653426731} is an apocalyptic number.

20013653426731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013653426731 is an equidigital number, since it uses as much as digits as its factorization.

20013653426731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 20013653426731 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, four hundred twenty-six thousand, seven hundred thirty-one".