21514338 has 48 divisors (see below), whose sum is σ = 49098816. Its totient is φ = 6795360.

The previous prime is 21514301. The next prime is 21514369. The reversal of 21514338 is 83341512.

It is a happy number.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64833 + ... + 65163.

It is an arithmetic number, because the mean of its divisors is an integer number (1022892).

Almost surely, 2^21514338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21514338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24549408).

21514338 is an abundant number, since it is smaller than the sum of its proper divisors (27584478).

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

21514338 is a wasteful number, since it uses less digits than its factorization.

21514338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 516 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 21514338 is about 4638.3550963677. The cubic root of 21514338 is about 278.1266869064.

The spelling of 21514338 in words is "twenty-one million, five hundred fourteen thousand, three hundred thirty-eight".