20394265 has 8 divisors (see below), whose sum is σ = 24558408. Its totient is φ = 16258560.

The previous prime is 20394263. The next prime is 20394299. The reversal of 20394265 is 56249302.

It can be written as a sum of positive squares in 4 ways, for example, as 7354944 + 13039321 = 2712^2 + 3611^2 .

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

It is not a de Polignac number, because 20394265 - 2¹ = 20394263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20394263) 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, 5496 + ... + 8425.

It is an arithmetic number, because the mean of its divisors is an integer number (3069801).

Almost surely, 2^20394265 is an apocalyptic number.

It is an amenable number.

20394265 is a deficient number, since it is larger than the sum of its proper divisors (4164143).

20394265 is a wasteful number, since it uses less digits than its factorization.

20394265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14219.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20394265 is about 4516.0009964569. Note that the first 3 decimals coincide. The cubic root of 20394265 is about 273.2138341737.

The spelling of 20394265 in words is "twenty million, three hundred ninety-four thousand, two hundred sixty-five".