20525220823 has 2 divisors, whose sum is σ = 20525220824. Its totient is φ = 20525220822.

The previous prime is 20525220817. The next prime is 20525220853. The reversal of 20525220823 is 32802252502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20525220823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20525220853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262610411 + 10262610412.

It is an arithmetic number, because the mean of its divisors is an integer number (10262610412).

Almost surely, 2^20525220823 is an apocalyptic number.

20525220823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525220823 is an equidigital number, since it uses as much as digits as its factorization.

20525220823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 20525220823 in words is "twenty billion, five hundred twenty-five million, two hundred twenty thousand, eight hundred twenty-three".