20413999 has 8 divisors (see below), whose sum is σ = 22230000. Its totient is φ = 18672192.

The previous prime is 20413997. The next prime is 20414003. The reversal of 20413999 is 99931402.

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

It is a cyclic number.

It is not a de Polignac number, because 20413999 - 2¹ = 20413997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17974 + ... + 19075.

It is an arithmetic number, because the mean of its divisors is an integer number (2778750).

Almost surely, 2^20413999 is an apocalyptic number.

20413999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20413999 is a deficient number, since it is larger than the sum of its proper divisors (1816001).

20413999 is a wasteful number, since it uses less digits than its factorization.

20413999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37097.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 20413999 is about 4518.1853658300. The cubic root of 20413999 is about 273.3019286082.

It can be divided in two parts, 20413 and 999, that added together give a palindrome (21412).

The spelling of 20413999 in words is "twenty million, four hundred thirteen thousand, nine hundred ninety-nine".