21350332 has 12 divisors (see below), whose sum is σ = 38373160. Its totient is φ = 10386576.

The previous prime is 21350323. The next prime is 21350341. The reversal of 21350332 is 23305312.

It is an interprime number because it is at equal distance from previous prime (21350323) and next prime (21350341).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71982 + ... + 72277.

Almost surely, 2^21350332 is an apocalyptic number.

It is an amenable number.

21350332 is a deficient number, since it is larger than the sum of its proper divisors (17022828).

21350332 is a wasteful number, since it uses less digits than its factorization.

21350332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144300 (or 144298 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 21350332 is about 4620.6419467429. The cubic root of 21350332 is about 277.4181540409.

Adding to 21350332 its reverse (23305312), we get a palindrome (44655644).

The spelling of 21350332 in words is "twenty-one million, three hundred fifty thousand, three hundred thirty-two".