20682353 has 6 divisors (see below), whose sum is σ = 21918834. Its totient is φ = 19448096.

The previous prime is 20682329. The next prime is 20682367. The reversal of 20682353 is 35328602.

It can be written as a sum of positive squares in only one way, i.e., 19465744 + 1216609 = 4412^2 + 1103^2 .

It is not a de Polignac number, because 20682353 - 2¹⁴ = 20665969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20682373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18200 + ... + 19302.

It is an arithmetic number, because the mean of its divisors is an integer number (3653139).

Almost surely, 2^20682353 is an apocalyptic number.

It is an amenable number.

20682353 is a deficient number, since it is larger than the sum of its proper divisors (1236481).

20682353 is an frugal number, since it uses more digits than its factorization.

20682353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20682353 is about 4547.7855050563. The cubic root of 20682353 is about 274.4942904333.

The spelling of 20682353 in words is "twenty million, six hundred eighty-two thousand, three hundred fifty-three".