20525220853 has 2 divisors, whose sum is σ = 20525220854. Its totient is φ = 20525220852.

The previous prime is 20525220823. The next prime is 20525220871. The reversal of 20525220853 is 35802252502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20476751409 + 48469444 = 143097^2 + 6962^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525220853 - 2²¹ = 20523123701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20525220823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262610426 + 10262610427.

It is an arithmetic number, because the mean of its divisors is an integer number (10262610427).

Almost surely, 2^20525220853 is an apocalyptic number.

It is an amenable number.

20525220853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525220853 is an equidigital number, since it uses as much as digits as its factorization.

20525220853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 20525220853 in words is "twenty billion, five hundred twenty-five million, two hundred twenty thousand, eight hundred fifty-three".