21048337 has 4 divisors (see below), whose sum is σ = 21067776. Its totient is φ = 21028900.

The previous prime is 21048323. The next prime is 21048341. The reversal of 21048337 is 73384012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21048337 - 2¹⁵ = 21015569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21048317) 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, 7993 + ... + 10294.

It is an arithmetic number, because the mean of its divisors is an integer number (5266944).

Almost surely, 2^21048337 is an apocalyptic number.

It is an amenable number.

21048337 is a deficient number, since it is larger than the sum of its proper divisors (19439).

21048337 is a wasteful number, since it uses less digits than its factorization.

21048337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19438.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21048337 is about 4587.8466626512. The cubic root of 21048337 is about 276.1039349857.

The spelling of 21048337 in words is "twenty-one million, forty-eight thousand, three hundred thirty-seven".