21048527 has 4 divisors (see below), whose sum is σ = 21496416. Its totient is φ = 20600640.

The previous prime is 21048509. The next prime is 21048541. The reversal of 21048527 is 72584012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21048527 - 2¹² = 21044431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21048527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045527) 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, 223874 + ... + 223967.

It is an arithmetic number, because the mean of its divisors is an integer number (5374104).

Almost surely, 2^21048527 is an apocalyptic number.

21048527 is a deficient number, since it is larger than the sum of its proper divisors (447889).

21048527 is an equidigital number, since it uses as much as digits as its factorization.

21048527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447888.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 21048527 is about 4587.8673694866. The cubic root of 21048527 is about 276.1047657654.

The spelling of 21048527 in words is "twenty-one million, forty-eight thousand, five hundred twenty-seven".