21014023 has 16 divisors (see below), whose sum is σ = 23024736. Its totient is φ = 19102720.

The previous prime is 21013997. The next prime is 21014041. The reversal of 21014023 is 32041012.

It is a cyclic number.

It is not a de Polignac number, because 21014023 - 2⁵ = 21013991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21013994 and 21014012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74643 + ... + 74923.

It is an arithmetic number, because the mean of its divisors is an integer number (1439046).

Almost surely, 2^21014023 is an apocalyptic number.

21014023 is a deficient number, since it is larger than the sum of its proper divisors (2010713).

21014023 is a wasteful number, since it uses less digits than its factorization.

21014023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21014023 is about 4584.1054743537. The cubic root of 21014023 is about 275.9538141228.

Adding to 21014023 its reverse (32041012), we get a palindrome (53055035).

The spelling of 21014023 in words is "twenty-one million, fourteen thousand, twenty-three".