20945343 has 16 divisors (see below), whose sum is σ = 30260736. Its totient is φ = 12835200.

The previous prime is 20945321. The next prime is 20945363. The reversal of 20945343 is 34354902.

It is not a de Polignac number, because 20945343 - 2⁹ = 20944831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20945343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20945303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583 + ... + 6968.

It is an arithmetic number, because the mean of its divisors is an integer number (1891296).

Almost surely, 2^20945343 is an apocalyptic number.

20945343 is a deficient number, since it is larger than the sum of its proper divisors (9315393).

20945343 is a wasteful number, since it uses less digits than its factorization.

20945343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20945343 is about 4576.6082419189. The cubic root of 20945343 is about 275.6528532997.

The spelling of 20945343 in words is "twenty million, nine hundred forty-five thousand, three hundred forty-three".