20761967507 has 2 divisors, whose sum is σ = 20761967508. Its totient is φ = 20761967506.

The previous prime is 20761967461. The next prime is 20761967531. The reversal of 20761967507 is 70576916702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20761967507 - 2³² = 16467000211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20761967537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380983753 + 10380983754.

It is an arithmetic number, because the mean of its divisors is an integer number (10380983754).

Almost surely, 2^20761967507 is an apocalyptic number.

20761967507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20761967507 is an equidigital number, since it uses as much as digits as its factorization.

20761967507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 50.

The spelling of 20761967507 in words is "twenty billion, seven hundred sixty-one million, nine hundred sixty-seven thousand, five hundred seven".