20041477012691 has 2 divisors, whose sum is σ = 20041477012692. Its totient is φ = 20041477012690.

The previous prime is 20041477012651. The next prime is 20041477012693. The reversal of 20041477012691 is 19621077414002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20041477012691 is a prime.

It is a super-2 number, since 2×20041477012691² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 20041477012693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20041477012693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020738506345 + 10020738506346.

It is an arithmetic number, because the mean of its divisors is an integer number (10020738506346).

Almost surely, 2^{20041477012691} is an apocalyptic number.

20041477012691 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041477012691 is an equidigital number, since it uses as much as digits as its factorization.

20041477012691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 20041477012691 in words is "twenty trillion, forty-one billion, four hundred seventy-seven million, twelve thousand, six hundred ninety-one".