21314528 has 12 divisors (see below), whose sum is σ = 41963040. Its totient is φ = 10657248.

The previous prime is 21314497. The next prime is 21314543. The reversal of 21314528 is 82541312.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 21314497 and 21314506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333008 + ... + 333071.

It is an arithmetic number, because the mean of its divisors is an integer number (3496920).

Almost surely, 2^21314528 is an apocalyptic number.

It is an amenable number.

21314528 is a deficient number, since it is larger than the sum of its proper divisors (20648512).

21314528 is an equidigital number, since it uses as much as digits as its factorization.

21314528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666089 (or 666081 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 21314528 is about 4616.7659676445. The cubic root of 21314528 is about 277.2629927214.

It can be divided in two parts, 213 and 14528, that added together give a palindrome (14741).

The spelling of 21314528 in words is "twenty-one million, three hundred fourteen thousand, five hundred twenty-eight".