20862253 has 2 divisors, whose sum is σ = 20862254. Its totient is φ = 20862252.

The previous prime is 20862251. The next prime is 20862269. The reversal of 20862253 is 35226802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 1387684 = 4413^2 + 1178^2 .

It is a cyclic number.

It is not a de Polignac number, because 20862253 - 2¹ = 20862251 is a prime.

Together with 20862251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20862251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431126 + 10431127.

It is an arithmetic number, because the mean of its divisors is an integer number (10431127).

Almost surely, 2^20862253 is an apocalyptic number.

It is an amenable number.

20862253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20862253 is an equidigital number, since it uses as much as digits as its factorization.

20862253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20862253 is about 4567.5215379897. The cubic root of 20862253 is about 275.2878660539.

It can be divided in two parts, 20862 and 253, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20862253 in words is "twenty million, eight hundred sixty-two thousand, two hundred fifty-three".