21119028 has 24 divisors (see below), whose sum is σ = 56317632. Its totient is φ = 6033984.

The previous prime is 21119023. The next prime is 21119039. The reversal of 21119028 is 82091112.

It is a junction number, because it is equal to n+sod(n) for n = 21118989 and 21119007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21119023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125625 + ... + 125792.

It is an arithmetic number, because the mean of its divisors is an integer number (2346568).

Almost surely, 2^21119028 is an apocalyptic number.

21119028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21119028 is an abundant number, since it is smaller than the sum of its proper divisors (35198604).

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

21119028 is a wasteful number, since it uses less digits than its factorization.

21119028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251431 (or 251429 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 21119028 is about 4595.5443638377. The cubic root of 21119028 is about 276.4126886484.

The spelling of 21119028 in words is "twenty-one million, one hundred nineteen thousand, twenty-eight".