20662465 has 16 divisors (see below), whose sum is σ = 25860672. Its totient is φ = 15833664.

The previous prime is 20662459. The next prime is 20662493. The reversal of 20662465 is 56426602.

It is a cyclic number.

It is not a de Polignac number, because 20662465 - 2³ = 20662457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11562 + ... + 13228.

It is an arithmetic number, because the mean of its divisors is an integer number (1616292).

Almost surely, 2^20662465 is an apocalyptic number.

It is an amenable number.

20662465 is a deficient number, since it is larger than the sum of its proper divisors (5198207).

20662465 is a wasteful number, since it uses less digits than its factorization.

20662465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20662465 is about 4545.5984204503. The cubic root of 20662465 is about 274.4062783132.

The spelling of 20662465 in words is "twenty million, six hundred sixty-two thousand, four hundred sixty-five".