20447465 has 16 divisors (see below), whose sum is σ = 25704000. Its totient is φ = 15594432.

The previous prime is 20447443. The next prime is 20447467. The reversal of 20447465 is 56474402.

It is a cyclic number.

It is not a de Polignac number, because 20447465 - 2¹⁰ = 20446441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20447467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11186 + ... + 12884.

It is an arithmetic number, because the mean of its divisors is an integer number (1606500).

Almost surely, 2^20447465 is an apocalyptic number.

It is an amenable number.

20447465 is a deficient number, since it is larger than the sum of its proper divisors (5256535).

20447465 is a wasteful number, since it uses less digits than its factorization.

20447465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 20447465 is about 4521.8873272119. The cubic root of 20447465 is about 273.4511942965.

The spelling of 20447465 in words is "twenty million, four hundred forty-seven thousand, four hundred sixty-five".