20951291525323 has 2 divisors, whose sum is σ = 20951291525324. Its totient is φ = 20951291525322.

The previous prime is 20951291525279. The next prime is 20951291525347. The reversal of 20951291525323 is 32352519215902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20951291525323 is a prime.

It is not a weakly prime, because it can be changed into another prime (20951291525023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475645762661 + 10475645762662.

It is an arithmetic number, because the mean of its divisors is an integer number (10475645762662).

Almost surely, 2^{20951291525323} is an apocalyptic number.

20951291525323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20951291525323 is an equidigital number, since it uses as much as digits as its factorization.

20951291525323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 49.

The spelling of 20951291525323 in words is "twenty trillion, nine hundred fifty-one billion, two hundred ninety-one million, five hundred twenty-five thousand, three hundred twenty-three".