21014352 has 30 divisors (see below), whose sum is σ = 58811402. Its totient is φ = 7004736.

The previous prime is 21014351. The next prime is 21014381. The reversal of 21014352 is 25341012.

It can be written as a sum of positive squares in only one way, i.e., 21013056 + 1296 = 4584^2 + 36^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72823 + ... + 73110.

Almost surely, 2^21014352 is an apocalyptic number.

It is an amenable number.

21014352 is an abundant number, since it is smaller than the sum of its proper divisors (37797050).

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

21014352 is a wasteful number, since it uses less digits than its factorization.

21014352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145947 (or 145938 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 21014352 is about 4584.1413590770. The cubic root of 21014352 is about 275.9552542458.

Adding to 21014352 its reverse (25341012), we get a palindrome (46355364).

The spelling of 21014352 in words is "twenty-one million, fourteen thousand, three hundred fifty-two".