20331401 has 8 divisors (see below), whose sum is σ = 20974464. Its totient is φ = 19697200.

The previous prime is 20331373. The next prime is 20331403. The reversal of 20331401 is 10413302.

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-20331401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606 + ... + 6888.

It is an arithmetic number, because the mean of its divisors is an integer number (2621808).

Almost surely, 2^20331401 is an apocalyptic number.

It is an amenable number.

20331401 is a deficient number, since it is larger than the sum of its proper divisors (643063).

20331401 is a wasteful number, since it uses less digits than its factorization.

20331401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20331401 is about 4509.0354844468. The cubic root of 20331401 is about 272.9328239319.

Adding to 20331401 its reverse (10413302), we get a palindrome (30744703).

The spelling of 20331401 in words is "twenty million, three hundred thirty-one thousand, four hundred one".