20368031 has 4 divisors (see below), whose sum is σ = 20383200. Its totient is φ = 20352864.

The previous prime is 20368003. The next prime is 20368037. The reversal of 20368031 is 13086302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20368031 - 2¹⁴ = 20351647 is a prime.

It is a super-2 number, since 2×20368031² = 829713373633922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20367988 and 20368006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368037) 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, 5351 + ... + 8328.

It is an arithmetic number, because the mean of its divisors is an integer number (5095800).

Almost surely, 2^20368031 is an apocalyptic number.

20368031 is a deficient number, since it is larger than the sum of its proper divisors (15169).

20368031 is a wasteful number, since it uses less digits than its factorization.

20368031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15168.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20368031 is about 4513.0955008730. The cubic root of 20368031 is about 273.0966350950.

The spelling of 20368031 in words is "twenty million, three hundred sixty-eight thousand, thirty-one".