20453943 has 16 divisors (see below), whose sum is σ = 28131840. Its totient is φ = 13212864.

The previous prime is 20453921. The next prime is 20453987. The reversal of 20453943 is 34935402.

It is not a de Polignac number, because 20453943 - 2⁸ = 20453687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20453943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453743) 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, 12130 + ... + 13712.

It is an arithmetic number, because the mean of its divisors is an integer number (1758240).

Almost surely, 2^20453943 is an apocalyptic number.

20453943 is a deficient number, since it is larger than the sum of its proper divisors (7677897).

20453943 is a wasteful number, since it uses less digits than its factorization.

20453943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

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

The square root of 20453943 is about 4522.6035643200. The cubic root of 20453943 is about 273.4800687772.

The spelling of 20453943 in words is "twenty million, four hundred fifty-three thousand, nine hundred forty-three".