21014382 has 16 divisors (see below), whose sum is σ = 42083712. Its totient is φ = 6995640.

The previous prime is 21014381. The next prime is 21014407. The reversal of 21014382 is 28341012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4023 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (2630232).

Almost surely, 2^21014382 is an apocalyptic number.

21014382 is an abundant number, since it is smaller than the sum of its proper divisors (21069330).

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

21014382 is a wasteful number, since it uses less digits than its factorization.

21014382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21014382 is about 4584.1446312262. The cubic root of 21014382 is about 275.9553855632.

Adding to 21014382 its reverse (28341012), we get a palindrome (49355394).

The spelling of 21014382 in words is "twenty-one million, fourteen thousand, three hundred eighty-two".