20333345 has 4 divisors (see below), whose sum is σ = 24400020. Its totient is φ = 16266672.

The previous prime is 20333297. The next prime is 20333353. The reversal of 20333345 is 54333302.

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 14876449 + 5456896 = 3857^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 20333345 - 2¹⁶ = 20267809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20333345.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033330 + ... + 2033339.

It is an arithmetic number, because the mean of its divisors is an integer number (6100005).

Almost surely, 2^20333345 is an apocalyptic number.

It is an amenable number.

20333345 is a deficient number, since it is larger than the sum of its proper divisors (4066675).

20333345 is an equidigital number, since it uses as much as digits as its factorization.

20333345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066674.

The product of its (nonzero) digits is 3240, while the sum is 23.

The square root of 20333345 is about 4509.2510464599. The cubic root of 20333345 is about 272.9415225373.

Adding to 20333345 its reverse (54333302), we get a palindrome (74666647).

The spelling of 20333345 in words is "twenty million, three hundred thirty-three thousand, three hundred forty-five".