20031406 has 8 divisors (see below), whose sum is σ = 31814640. Its totient is φ = 9426528.

The previous prime is 20031383. The next prime is 20031409. The reversal of 20031406 is 60413002.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20031406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294546 + ... + 294613.

It is an arithmetic number, because the mean of its divisors is an integer number (3976830).

Almost surely, 2^20031406 is an apocalyptic number.

20031406 is a deficient number, since it is larger than the sum of its proper divisors (11783234).

20031406 is a wasteful number, since it uses less digits than its factorization.

20031406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589178.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20031406 is about 4475.6458751782. The cubic root of 20031406 is about 271.5837690201.

Adding to 20031406 its reverse (60413002), we get a palindrome (80444408).

The spelling of 20031406 in words is "twenty million, thirty-one thousand, four hundred six".