20131022 has 4 divisors (see below), whose sum is σ = 30196536. Its totient is φ = 10065510.

The previous prime is 20131019. The next prime is 20131031. The reversal of 20131022 is 22013102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22013102 = 2 ⋅11006551.

It is a junction number, because it is equal to n+sod(n) for n = 20130994 and 20131012.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5032754 + ... + 5032757.

It is an arithmetic number, because the mean of its divisors is an integer number (7549134).

Almost surely, 2^20131022 is an apocalyptic number.

20131022 is a deficient number, since it is larger than the sum of its proper divisors (10065514).

20131022 is a wasteful number, since it uses less digits than its factorization.

20131022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065513.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20131022 is about 4486.7607469086. The cubic root of 20131022 is about 272.0332193424.

Adding to 20131022 its reverse (22013102), we get a palindrome (42144124).

It can be divided in two parts, 2013102 and 2, that multiplied together give a palindrome (4026204).

The spelling of 20131022 in words is "twenty million, one hundred thirty-one thousand, twenty-two".