20836465 has 8 divisors (see below), whose sum is σ = 26927208. Its totient is φ = 15386880.

The previous prime is 20836457. The next prime is 20836477. The reversal of 20836465 is 56463802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51984 + 20784481 = 228^2 + 4559^2 .

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

It is not a de Polignac number, because 20836465 - 2³ = 20836457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20836465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160216 + ... + 160345.

It is an arithmetic number, because the mean of its divisors is an integer number (3365901).

Almost surely, 2^20836465 is an apocalyptic number.

It is an amenable number.

20836465 is a deficient number, since it is larger than the sum of its proper divisors (6090743).

20836465 is a wasteful number, since it uses less digits than its factorization.

20836465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320579.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 20836465 is about 4564.6976898805. The cubic root of 20836465 is about 275.1743907644.

The spelling of 20836465 in words is "twenty million, eight hundred thirty-six thousand, four hundred sixty-five".