20762043630557 has 2 divisors, whose sum is σ = 20762043630558. Its totient is φ = 20762043630556.

The previous prime is 20762043630541. The next prime is 20762043630619. The reversal of 20762043630557 is 75503634026702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12585955333561 + 8176088296996 = 3547669^2 + 2859386^2 .

It is a cyclic number.

It is not a de Polignac number, because 20762043630557 - 2⁴ = 20762043630541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20762043630527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381021815278 + 10381021815279.

It is an arithmetic number, because the mean of its divisors is an integer number (10381021815279).

Almost surely, 2^{20762043630557} is an apocalyptic number.

It is an amenable number.

20762043630557 is a deficient number, since it is larger than the sum of its proper divisors (1).

20762043630557 is an equidigital number, since it uses as much as digits as its factorization.

20762043630557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6350400, while the sum is 50.

The spelling of 20762043630557 in words is "twenty trillion, seven hundred sixty-two billion, forty-three million, six hundred thirty thousand, five hundred fifty-seven".