20146345 has 8 divisors (see below), whose sum is σ = 24280776. Its totient is φ = 16046976.

The previous prime is 20146339. The next prime is 20146349. The reversal of 20146345 is 54364102.

It can be written as a sum of positive squares in 4 ways, for example, as 326041 + 19820304 = 571^2 + 4452^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20146345 - 2³ = 20146337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20146349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7482 + ... + 9811.

It is an arithmetic number, because the mean of its divisors is an integer number (3035097).

Almost surely, 2^20146345 is an apocalyptic number.

It is an amenable number.

20146345 is a deficient number, since it is larger than the sum of its proper divisors (4134431).

20146345 is a wasteful number, since it uses less digits than its factorization.

20146345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17531.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20146345 is about 4488.4680014455. The cubic root of 20146345 is about 272.1022224274.

The spelling of 20146345 in words is "twenty million, one hundred forty-six thousand, three hundred forty-five".