21014015 has 8 divisors (see below), whose sum is σ = 27509328. Its totient is φ = 15282880.

The previous prime is 21013997. The next prime is 21014041. The reversal of 21014015 is 51041012.

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

It is not a de Polignac number, because 21014015 - 2¹⁰ = 21012991 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190982 + ... + 191091.

It is an arithmetic number, because the mean of its divisors is an integer number (3438666).

Almost surely, 2^21014015 is an apocalyptic number.

21014015 is a deficient number, since it is larger than the sum of its proper divisors (6495313).

21014015 is a wasteful number, since it uses less digits than its factorization.

21014015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382089.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21014015 is about 4584.1046017734. The cubic root of 21014015 is about 275.9537791045.

Adding to 21014015 its reverse (51041012), we get a palindrome (72055027).

It can be divided in two parts, 2101 and 4015, that added together give a palindrome (6116).

The spelling of 21014015 in words is "twenty-one million, fourteen thousand, fifteen".