20432487 has 16 divisors (see below), whose sum is σ = 30101760. Its totient is φ = 12262272.

The previous prime is 20432449. The next prime is 20432513. The reversal of 20432487 is 78423402.

It is not a de Polignac number, because 20432487 - 2¹¹ = 20430439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432407) 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, 7537 + ... + 9882.

It is an arithmetic number, because the mean of its divisors is an integer number (1881360).

Almost surely, 2^20432487 is an apocalyptic number.

20432487 is a deficient number, since it is larger than the sum of its proper divisors (9669273).

20432487 is a wasteful number, since it uses less digits than its factorization.

20432487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17462.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 20432487 is about 4520.2308569364. The cubic root of 20432487 is about 273.3844092866.

Adding to 20432487 its reverse (78423402), we get a palindrome (98855889).

The spelling of 20432487 in words is "twenty million, four hundred thirty-two thousand, four hundred eighty-seven".