20853587926253 has 2 divisors, whose sum is σ = 20853587926254. Its totient is φ = 20853587926252.

The previous prime is 20853587926247. The next prime is 20853587926277. The reversal of 20853587926253 is 35262978535802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13132230840964 + 7721357085289 = 3623842^2 + 2778733^2 .

It is a cyclic number.

It is not a de Polignac number, because 20853587926253 - 2¹⁶ = 20853587860717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20853587926253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20853587226253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426793963126 + 10426793963127.

It is an arithmetic number, because the mean of its divisors is an integer number (10426793963127).

Almost surely, 2^{20853587926253} is an apocalyptic number.

It is an amenable number.

20853587926253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853587926253 is an equidigital number, since it uses as much as digits as its factorization.

20853587926253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728000, while the sum is 65.

The spelling of 20853587926253 in words is "twenty trillion, eight hundred fifty-three billion, five hundred eighty-seven million, nine hundred twenty-six thousand, two hundred fifty-three".