20408107 has 8 divisors (see below), whose sum is σ = 21359520. Its totient is φ = 19462080.

The previous prime is 20408081. The next prime is 20408117. The reversal of 20408107 is 70180402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20408107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20408117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7807 + ... + 10087.

It is an arithmetic number, because the mean of its divisors is an integer number (2669940).

Almost surely, 2^20408107 is an apocalyptic number.

20408107 is a deficient number, since it is larger than the sum of its proper divisors (951413).

20408107 is a wasteful number, since it uses less digits than its factorization.

20408107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20408107 is about 4517.5332870937. The cubic root of 20408107 is about 273.2756321124.

Adding to 20408107 its reverse (70180402), we get a palindrome (90588509).

The spelling of 20408107 in words is "twenty million, four hundred eight thousand, one hundred seven".