21074801 has 4 divisors (see below), whose sum is σ = 22990704. Its totient is φ = 19158900.

The previous prime is 21074797. The next prime is 21074803. The reversal of 21074801 is 10847012.

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 21074801 - 2² = 21074797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21074803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957935 + ... + 957956.

It is an arithmetic number, because the mean of its divisors is an integer number (5747676).

Almost surely, 2^21074801 is an apocalyptic number.

It is an amenable number.

21074801 is a deficient number, since it is larger than the sum of its proper divisors (1915903).

21074801 is a wasteful number, since it uses less digits than its factorization.

21074801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915902.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 21074801 is about 4590.7298983931. The cubic root of 21074801 is about 276.2196013587.

The spelling of 21074801 in words is "twenty-one million, seventy-four thousand, eight hundred one".