21022048 has 12 divisors (see below), whose sum is σ = 41387220. Its totient is φ = 10511008.

The previous prime is 21022021. The next prime is 21022049. The reversal of 21022048 is 84022012.

It is a super-2 number, since 2×21022048² = 883853004228608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328438 + ... + 328501.

It is an arithmetic number, because the mean of its divisors is an integer number (3448935).

Almost surely, 2^21022048 is an apocalyptic number.

It is an amenable number.

21022048 is a deficient number, since it is larger than the sum of its proper divisors (20365172).

21022048 is an equidigital number, since it uses as much as digits as its factorization.

21022048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656949 (or 656941 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 21022048 is about 4584.9806978874. The cubic root of 21022048 is about 275.9889374548.

The spelling of 21022048 in words is "twenty-one million, twenty-two thousand, forty-eight".