20734265 has 8 divisors (see below), whose sum is σ = 25063560. Its totient is φ = 16465792.

The previous prime is 20734253. The next prime is 20734267. The reversal of 20734265 is 56243702.

It can be written as a sum of positive squares in 4 ways, for example, as 5555449 + 15178816 = 2357^2 + 3896^2 .

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 20734265 - 2²⁴ = 3957049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20734267) 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, 14450 + ... + 15819.

It is an arithmetic number, because the mean of its divisors is an integer number (3132945).

Almost surely, 2^20734265 is an apocalyptic number.

It is an amenable number.

20734265 is a deficient number, since it is larger than the sum of its proper divisors (4329295).

20734265 is a wasteful number, since it uses less digits than its factorization.

20734265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30411.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 20734265 is about 4553.4893213886. The cubic root of 20734265 is about 274.7237556565.

Adding to 20734265 its reverse (56243702), we get a palindrome (76977967).

The spelling of 20734265 in words is "twenty million, seven hundred thirty-four thousand, two hundred sixty-five".