20753645771 has 2 divisors, whose sum is σ = 20753645772. Its totient is φ = 20753645770.

The previous prime is 20753645701. The next prime is 20753645789. The reversal of 20753645771 is 17754635702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20753645771 - 2¹⁸ = 20753383627 is a prime.

It is not a weakly prime, because it can be changed into another prime (20753645701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10376822885 + 10376822886.

It is an arithmetic number, because the mean of its divisors is an integer number (10376822886).

Almost surely, 2^20753645771 is an apocalyptic number.

20753645771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20753645771 is an equidigital number, since it uses as much as digits as its factorization.

20753645771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1234800, while the sum is 47.

The spelling of 20753645771 in words is "twenty billion, seven hundred fifty-three million, six hundred forty-five thousand, seven hundred seventy-one".