21023022 has 16 divisors (see below), whose sum is σ = 43402752. Its totient is φ = 6781560.

The previous prime is 21023017. The next prime is 21023047. The reversal of 21023022 is 22032012.

It is a junction number, because it is equal to n+sod(n) for n = 21022989 and 21023007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56328 + ... + 56699.

It is an arithmetic number, because the mean of its divisors is an integer number (2712672).

Almost surely, 2^21023022 is an apocalyptic number.

21023022 is an abundant number, since it is smaller than the sum of its proper divisors (22379730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023022 is a wasteful number, since it uses less digits than its factorization.

21023022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113063.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 21023022 is about 4585.0869130257. The cubic root of 21023022 is about 275.9931997904.

Adding to 21023022 its reverse (22032012), we get a palindrome (43055034).

It can be divided in two parts, 210 and 23022, that added together give a palindrome (23232).

The spelling of 21023022 in words is "twenty-one million, twenty-three thousand, twenty-two".