20374345 has 4 divisors (see below), whose sum is σ = 24449220. Its totient is φ = 16299472.

The previous prime is 20374339. The next prime is 20374351. The reversal of 20374345 is 54347302.

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

It is an interprime number because it is at equal distance from previous prime (20374339) and next prime (20374351).

It can be written as a sum of positive squares in 2 ways, for example, as 6446521 + 13927824 = 2539^2 + 3732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20374345 is a prime.

It is a super-2 number, since 2×20374345² = 830227868358050, which contains 22 as substring.

It is an unprimeable number.

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, 2037430 + ... + 2037439.

It is an arithmetic number, because the mean of its divisors is an integer number (6112305).

Almost surely, 2^20374345 is an apocalyptic number.

It is an amenable number.

20374345 is a deficient number, since it is larger than the sum of its proper divisors (4074875).

20374345 is an equidigital number, since it uses as much as digits as its factorization.

20374345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074874.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 20374345 is about 4513.7949665442. The cubic root of 20374345 is about 273.1248517647.

The spelling of 20374345 in words is "twenty million, three hundred seventy-four thousand, three hundred forty-five".