20404167 has 16 divisors (see below), whose sum is σ = 31333632. Its totient is φ = 11568960.

The previous prime is 20404159. The next prime is 20404171. The reversal of 20404167 is 76140402.

It is not a de Polignac number, because 20404167 - 2³ = 20404159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404127) 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, 958 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (1958352).

Almost surely, 2^20404167 is an apocalyptic number.

20404167 is a deficient number, since it is larger than the sum of its proper divisors (10929465).

20404167 is a wasteful number, since it uses less digits than its factorization.

20404167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20404167 is about 4517.0971873538. The cubic root of 20404167 is about 273.2580447342.

Adding to 20404167 its reverse (76140402), we get a palindrome (96544569).

The spelling of 20404167 in words is "twenty million, four hundred four thousand, one hundred sixty-seven".