20451343 has 16 divisors (see below), whose sum is σ = 23173920. Its totient is φ = 17884800.

The previous prime is 20451329. The next prime is 20451373. The reversal of 20451343 is 34315402.

It is a cyclic number.

It is not a de Polignac number, because 20451343 - 2⁵ = 20451311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451373) 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, 44133 + ... + 44593.

It is an arithmetic number, because the mean of its divisors is an integer number (1448370).

Almost surely, 2^20451343 is an apocalyptic number.

20451343 is a deficient number, since it is larger than the sum of its proper divisors (2722577).

20451343 is a wasteful number, since it uses less digits than its factorization.

20451343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20451343 is about 4522.3161101365. The cubic root of 20451343 is about 273.4684804930.

Adding to 20451343 its reverse (34315402), we get a palindrome (54766745).

The spelling of 20451343 in words is "twenty million, four hundred fifty-one thousand, three hundred forty-three".