20732665 has 8 divisors (see below), whose sum is σ = 25458048. Its totient is φ = 16200240.

The previous prime is 20732627. The next prime is 20732689. The reversal of 20732665 is 56623702.

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

It is not a de Polignac number, because 20732665 - 2¹⁷ = 20601593 is a prime.

It is a Duffinian number.

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, 48001 + ... + 48430.

It is an arithmetic number, because the mean of its divisors is an integer number (3182256).

Almost surely, 2^20732665 is an apocalyptic number.

It is an amenable number.

20732665 is a deficient number, since it is larger than the sum of its proper divisors (4725383).

20732665 is an equidigital number, since it uses as much as digits as its factorization.

20732665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96479.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20732665 is about 4553.3136285567. The cubic root of 20732665 is about 274.7166889432.

The spelling of 20732665 in words is "twenty million, seven hundred thirty-two thousand, six hundred sixty-five".