21048827 has 12 divisors (see below), whose sum is σ = 22402800. Its totient is φ = 19773072.

The previous prime is 21048803. The next prime is 21048829. The reversal of 21048827 is 72884012.

It is not a de Polignac number, because 21048827 - 2⁸ = 21048571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21048793 and 21048802.

It is not an unprimeable number, because it can be changed into a prime (21048829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71693 + ... + 71985.

It is an arithmetic number, because the mean of its divisors is an integer number (1866900).

Almost surely, 2^21048827 is an apocalyptic number.

21048827 is a deficient number, since it is larger than the sum of its proper divisors (1353973).

21048827 is a wasteful number, since it uses less digits than its factorization.

21048827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 21048827 is about 4587.9000642996. The cubic root of 21048827 is about 276.1060775125.

The spelling of 21048827 in words is "twenty-one million, forty-eight thousand, eight hundred twenty-seven".