20632447 has 4 divisors (see below), whose sum is σ = 22508136. Its totient is φ = 18756760.

The previous prime is 20632439. The next prime is 20632481. The reversal of 20632447 is 74423602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20632447 - 2³ = 20632439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937828 + ... + 937849.

It is an arithmetic number, because the mean of its divisors is an integer number (5627034).

Almost surely, 2^20632447 is an apocalyptic number.

20632447 is a deficient number, since it is larger than the sum of its proper divisors (1875689).

20632447 is a wasteful number, since it uses less digits than its factorization.

20632447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875688.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20632447 is about 4542.2953448670. The cubic root of 20632447 is about 274.2733299969.

The spelling of 20632447 in words is "twenty million, six hundred thirty-two thousand, four hundred forty-seven".