20407959 has 48 divisors (see below), whose sum is σ = 35197344. Its totient is φ = 11232000.

The previous prime is 20407921. The next prime is 20407987. The reversal of 20407959 is 95970402.

It is not a de Polignac number, because 20407959 - 2¹¹ = 20405911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20407559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129909 + ... + 130065.

It is an arithmetic number, because the mean of its divisors is an integer number (733278).

Almost surely, 2^20407959 is an apocalyptic number.

20407959 is a deficient number, since it is larger than the sum of its proper divisors (14789385).

20407959 is a wasteful number, since it uses less digits than its factorization.

20407959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20407959 is about 4517.5169064432. The cubic root of 20407959 is about 273.2749715107.

It can be divided in two parts, 2040 and 7959, that added together give a palindrome (9999).

The spelling of 20407959 in words is "twenty million, four hundred seven thousand, nine hundred fifty-nine".