20343401 has 4 divisors (see below), whose sum is σ = 21908292. Its totient is φ = 18778512.

The previous prime is 20343397. The next prime is 20343403. The reversal of 20343401 is 10434302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2059225 + 18284176 = 1435^2 + 4276^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343401 - 2² = 20343397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20343401.

It is not an unprimeable number, because it can be changed into a prime (20343403) 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, 782426 + ... + 782451.

It is an arithmetic number, because the mean of its divisors is an integer number (5477073).

Almost surely, 2^20343401 is an apocalyptic number.

It is an amenable number.

20343401 is a deficient number, since it is larger than the sum of its proper divisors (1564891).

20343401 is a wasteful number, since it uses less digits than its factorization.

20343401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564890.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20343401 is about 4510.3659496764. The cubic root of 20343401 is about 272.9865101771.

Adding to 20343401 its reverse (10434302), we get a palindrome (30777703).

Subtracting from 20343401 its reverse (10434302), we obtain a palindrome (9909099).

The spelling of 20343401 in words is "twenty million, three hundred forty-three thousand, four hundred one".