20747401041761 has 2 divisors, whose sum is σ = 20747401041762. Its totient is φ = 20747401041760.

The previous prime is 20747401041559. The next prime is 20747401041767. The reversal of 20747401041761 is 16714010474702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10644030225361 + 10103370816400 = 3262519^2 + 3178580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20747401041761 is a prime.

It is a super-2 number, since 2×20747401041761² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20747401041767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10373700520880 + 10373700520881.

It is an arithmetic number, because the mean of its divisors is an integer number (10373700520881).

Almost surely, 2^{20747401041761} is an apocalyptic number.

It is an amenable number.

20747401041761 is a deficient number, since it is larger than the sum of its proper divisors (1).

20747401041761 is an equidigital number, since it uses as much as digits as its factorization.

20747401041761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 20747401041761 in words is "twenty trillion, seven hundred forty-seven billion, four hundred one million, forty-one thousand, seven hundred sixty-one".