21876793 has 8 divisors (see below), whose sum is σ = 22749440. Its totient is φ = 21014640.

The previous prime is 21876791. The next prime is 21876797. The reversal of 21876793 is 39767812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21876793 - 2¹ = 21876791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21876791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771 + ... + 6847.

It is an arithmetic number, because the mean of its divisors is an integer number (2843680).

Almost surely, 2^21876793 is an apocalyptic number.

It is an amenable number.

21876793 is a deficient number, since it is larger than the sum of its proper divisors (872647).

21876793 is a wasteful number, since it uses less digits than its factorization.

21876793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247.

The product of its digits is 127008, while the sum is 43.

The square root of 21876793 is about 4677.2634093025. The cubic root of 21876793 is about 279.6798764898.

The spelling of 21876793 in words is "twenty-one million, eight hundred seventy-six thousand, seven hundred ninety-three".