20863343 has 4 divisors (see below), whose sum is σ = 20955480. Its totient is φ = 20771208.

The previous prime is 20863321. The next prime is 20863351. The reversal of 20863343 is 34336802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34336802 = 2 ⋅17168401.

It is a cyclic number.

It is not a de Polignac number, because 20863343 - 2¹⁸ = 20601199 is a prime.

It is a super-2 number, since 2×20863343² = 870558162271298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45728 + ... + 46181.

It is an arithmetic number, because the mean of its divisors is an integer number (5238870).

Almost surely, 2^20863343 is an apocalyptic number.

20863343 is a deficient number, since it is larger than the sum of its proper divisors (92137).

20863343 is an equidigital number, since it uses as much as digits as its factorization.

20863343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92136.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 20863343 is about 4567.6408571603. The cubic root of 20863343 is about 275.2926603355.

The spelling of 20863343 in words is "twenty million, eight hundred sixty-three thousand, three hundred forty-three".