20995353767 has 2 divisors, whose sum is σ = 20995353768. Its totient is φ = 20995353766.

The previous prime is 20995353751. The next prime is 20995353773. The reversal of 20995353767 is 76735359902.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20995353767 - 2⁴ = 20995353751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20995353367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497676883 + 10497676884.

It is an arithmetic number, because the mean of its divisors is an integer number (10497676884).

Almost surely, 2^20995353767 is an apocalyptic number.

20995353767 is a deficient number, since it is larger than the sum of its proper divisors (1).

20995353767 is an equidigital number, since it uses as much as digits as its factorization.

20995353767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10716300, while the sum is 56.

The spelling of 20995353767 in words is "twenty billion, nine hundred ninety-five million, three hundred fifty-three thousand, seven hundred sixty-seven".