22038021 has 8 divisors (see below), whose sum is σ = 32648960. Its totient is φ = 14691996.

The previous prime is 22038011. The next prime is 22038047. The reversal of 22038021 is 12083022.

It is a happy number.

It is not a de Polignac number, because 22038021 - 2⁵ = 22037989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22037985 and 22038003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22038011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408085 + ... + 408138.

It is an arithmetic number, because the mean of its divisors is an integer number (4081120).

Almost surely, 2^22038021 is an apocalyptic number.

It is an amenable number.

22038021 is a deficient number, since it is larger than the sum of its proper divisors (10610939).

22038021 is an equidigital number, since it uses as much as digits as its factorization.

22038021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816232 (or 816226 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22038021 is about 4694.4670624044. The cubic root of 22038021 is about 280.3652588583.

The spelling of 22038021 in words is "twenty-two million, thirty-eight thousand, twenty-one".