20612536853 has 2 divisors, whose sum is σ = 20612536854. Its totient is φ = 20612536852.

The previous prime is 20612536849. The next prime is 20612536909. The reversal of 20612536853 is 35863521602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16296309649 + 4316227204 = 127657^2 + 65698^2 .

It is a cyclic number.

It is not a de Polignac number, because 20612536853 - 2² = 20612536849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20612536853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20612536843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306268426 + 10306268427.

It is an arithmetic number, because the mean of its divisors is an integer number (10306268427).

Almost surely, 2^20612536853 is an apocalyptic number.

It is an amenable number.

20612536853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20612536853 is an equidigital number, since it uses as much as digits as its factorization.

20612536853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20612536853 in words is "twenty billion, six hundred twelve million, five hundred thirty-six thousand, eight hundred fifty-three".