20674032761 has 2 divisors, whose sum is σ = 20674032762. Its totient is φ = 20674032760.

The previous prime is 20674032727. The next prime is 20674032763. The reversal of 20674032761 is 16723047602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14404560361 + 6269472400 = 120019^2 + 79180^2 .

It is a cyclic number.

It is not a de Polignac number, because 20674032761 - 2²² = 20669838457 is a prime.

Together with 20674032763, 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 (20674032763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337016380 + 10337016381.

It is an arithmetic number, because the mean of its divisors is an integer number (10337016381).

Almost surely, 2^20674032761 is an apocalyptic number.

It is an amenable number.

20674032761 is a deficient number, since it is larger than the sum of its proper divisors (1).

20674032761 is an equidigital number, since it uses as much as digits as its factorization.

20674032761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 20674032761 in words is "twenty billion, six hundred seventy-four million, thirty-two thousand, seven hundred sixty-one".