21040514 has 8 divisors (see below), whose sum is σ = 34429968. Its totient is φ = 9563860.

The previous prime is 21040511. The next prime is 21040517. The reversal of 21040514 is 41504012.

It is an interprime number because it is at equal distance from previous prime (21040511) and next prime (21040517).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21040492 and 21040501.

It is not an unprimeable number, because it can be changed into a prime (21040511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478172 + ... + 478215.

It is an arithmetic number, because the mean of its divisors is an integer number (4303746).

Almost surely, 2^21040514 is an apocalyptic number.

21040514 is a deficient number, since it is larger than the sum of its proper divisors (13389454).

21040514 is a wasteful number, since it uses less digits than its factorization.

21040514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956400.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21040514 is about 4586.9940047922. The cubic root of 21040514 is about 276.0697243854.

Adding to 21040514 its reverse (41504012), we get a palindrome (62544526).

The spelling of 21040514 in words is "twenty-one million, forty thousand, five hundred fourteen".