20031413 has 4 divisors (see below), whose sum is σ = 20902368. Its totient is φ = 19160460.

The previous prime is 20031409. The next prime is 20031439. The reversal of 20031413 is 31413002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31413002 = 2 ⋅15706501.

It is a cyclic number.

It is not a de Polignac number, because 20031413 - 2² = 20031409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031463) 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, 435443 + ... + 435488.

It is an arithmetic number, because the mean of its divisors is an integer number (5225592).

Almost surely, 2^20031413 is an apocalyptic number.

20031413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20031413 is a deficient number, since it is larger than the sum of its proper divisors (870955).

20031413 is an equidigital number, since it uses as much as digits as its factorization.

20031413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870954.

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

The square root of 20031413 is about 4475.6466571882. The cubic root of 20031413 is about 271.5838006552.

Adding to 20031413 its reverse (31413002), we get a palindrome (51444415).

It can be divided in two parts, 200 and 31413, that added together give a palindrome (31613).

The spelling of 20031413 in words is "twenty million, thirty-one thousand, four hundred thirteen".