21014357 has 16 divisors (see below), whose sum is σ = 26759040. Its totient is φ = 16051392.

The previous prime is 21014351. The next prime is 21014381. The reversal of 21014357 is 75341012.

It is not a de Polignac number, because 21014357 - 2⁸ = 21014101 is a prime.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1343 + ... + 6620.

It is an arithmetic number, because the mean of its divisors is an integer number (1672440).

Almost surely, 2^21014357 is an apocalyptic number.

It is an amenable number.

21014357 is a deficient number, since it is larger than the sum of its proper divisors (5744683).

21014357 is a wasteful number, since it uses less digits than its factorization.

21014357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21014357 is about 4584.1419044353. The cubic root of 21014357 is about 275.9552761320.

Adding to 21014357 its reverse (75341012), we get a palindrome (96355369).

The spelling of 21014357 in words is "twenty-one million, fourteen thousand, three hundred fifty-seven".