20469943 has 4 divisors (see below), whose sum is σ = 22044568. Its totient is φ = 18895320.

The previous prime is 20469941. The next prime is 20469949. The reversal of 20469943 is 34996402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20469943 - 2¹ = 20469941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20469941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787293 + ... + 787318.

It is an arithmetic number, because the mean of its divisors is an integer number (5511142).

Almost surely, 2^20469943 is an apocalyptic number.

20469943 is a deficient number, since it is larger than the sum of its proper divisors (1574625).

20469943 is a wasteful number, since it uses less digits than its factorization.

20469943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574624.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 20469943 is about 4524.3721111332. The cubic root of 20469943 is about 273.5513596874.

It can be divided in two parts, 20469 and 943, that added together give a palindrome (21412).

The spelling of 20469943 in words is "twenty million, four hundred sixty-nine thousand, nine hundred forty-three".