20432345 has 8 divisors (see below), whose sum is σ = 24543240. Its totient is φ = 16329600.

The previous prime is 20432333. The next prime is 20432381. The reversal of 20432345 is 54323402.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 19811401 = 788^2 + 4451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20432345 - 2⁴ = 20432329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20432345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7871 + ... + 10139.

It is an arithmetic number, because the mean of its divisors is an integer number (3067905).

Almost surely, 2^20432345 is an apocalyptic number.

It is an amenable number.

20432345 is a deficient number, since it is larger than the sum of its proper divisors (4110895).

20432345 is a wasteful number, since it uses less digits than its factorization.

20432345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20432345 is about 4520.2151497467. The cubic root of 20432345 is about 273.3837759704.

Adding to 20432345 its reverse (54323402), we get a palindrome (74755747).

The spelling of 20432345 in words is "twenty million, four hundred thirty-two thousand, three hundred forty-five".