21015482 has 16 divisors (see below), whose sum is σ = 34081440. Its totient is φ = 9685008.

The previous prime is 21015473. The next prime is 21015497. The reversal of 21015482 is 28451012.

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, 6068 + ... + 8879.

It is an arithmetic number, because the mean of its divisors is an integer number (2130090).

Almost surely, 2^21015482 is an apocalyptic number.

21015482 is a deficient number, since it is larger than the sum of its proper divisors (13065958).

21015482 is a wasteful number, since it uses less digits than its factorization.

21015482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15005.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 21015482 is about 4584.2646084187. The cubic root of 21015482 is about 275.9602004503.

Adding to 21015482 its reverse (28451012), we get a palindrome (49466494).

The spelling of 21015482 in words is "twenty-one million, fifteen thousand, four hundred eighty-two".