20641814748131 has 2 divisors, whose sum is σ = 20641814748132. Its totient is φ = 20641814748130.

The previous prime is 20641814748119. The next prime is 20641814748257. The reversal of 20641814748131 is 13184741814602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20641814748131 - 2²² = 20641810553827 is a prime.

It is a super-2 number, since 2×20641814748131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20641814748131.

It is not a weakly prime, because it can be changed into another prime (20641814778131) 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, 10320907374065 + 10320907374066.

It is an arithmetic number, because the mean of its divisors is an integer number (10320907374066).

Almost surely, 2^{20641814748131} is an apocalyptic number.

20641814748131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641814748131 is an equidigital number, since it uses as much as digits as its factorization.

20641814748131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 20641814748131 in words is "twenty trillion, six hundred forty-one billion, eight hundred fourteen million, seven hundred forty-eight thousand, one hundred thirty-one".