20872853 has 2 divisors, whose sum is σ = 20872854. Its totient is φ = 20872852.

The previous prime is 20872807. The next prime is 20872861. The reversal of 20872853 is 35827802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20811844 + 61009 = 4562^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 20872853 - 2¹⁶ = 20807317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20872153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436426 + 10436427.

It is an arithmetic number, because the mean of its divisors is an integer number (10436427).

Almost surely, 2^20872853 is an apocalyptic number.

It is an amenable number.

20872853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20872853 is an equidigital number, since it uses as much as digits as its factorization.

20872853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 20872853 is about 4568.6817573563. The cubic root of 20872853 is about 275.3344822608.

The spelling of 20872853 in words is "twenty million, eight hundred seventy-two thousand, eight hundred fifty-three".