20496961567 has 2 divisors, whose sum is σ = 20496961568. Its totient is φ = 20496961566.

The previous prime is 20496961549. The next prime is 20496961609. The reversal of 20496961567 is 76516969402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20496961567 - 2⁷ = 20496961439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20496961867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10248480783 + 10248480784.

It is an arithmetic number, because the mean of its divisors is an integer number (10248480784).

Almost surely, 2^20496961567 is an apocalyptic number.

20496961567 is a deficient number, since it is larger than the sum of its proper divisors (1).

20496961567 is an equidigital number, since it uses as much as digits as its factorization.

20496961567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 20496961567 in words is "twenty billion, four hundred ninety-six million, nine hundred sixty-one thousand, five hundred sixty-seven".