20404467 has 12 divisors (see below), whose sum is σ = 30565080. Its totient is φ = 13602816.

The previous prime is 20404453. The next prime is 20404469. The reversal of 20404467 is 76440402.

It is not a de Polignac number, because 20404467 - 2¹¹ = 20402419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20404467.

It is not an unprimeable number, because it can be changed into a prime (20404469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41742 + ... + 42227.

It is an arithmetic number, because the mean of its divisors is an integer number (2547090).

Almost surely, 2^20404467 is an apocalyptic number.

20404467 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20404467 is a deficient number, since it is larger than the sum of its proper divisors (10160613).

20404467 is an frugal number, since it uses more digits than its factorization.

20404467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83984 (or 83972 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20404467 is about 4517.1303943986. The cubic root of 20404467 is about 273.2593839543.

Adding to 20404467 its reverse (76440402), we get a palindrome (96844869).

The spelling of 20404467 in words is "twenty million, four hundred four thousand, four hundred sixty-seven".