8793400021 has 8 divisors (see below), whose sum is σ = 10126315584. Its totient is φ = 7479663360.

The previous prime is 8793399977. The next prime is 8793400037. The reversal of 8793400021 is 1200043978.

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 8793400021 - 2⁷ = 8793399893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8793400021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8793400921) 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, 4793740 + ... + 4795573.

It is an arithmetic number, because the mean of its divisors is an integer number (1265789448).

Almost surely, 2^8793400021 is an apocalyptic number.

It is an amenable number.

8793400021 is a deficient number, since it is larger than the sum of its proper divisors (1332915563).

8793400021 is a wasteful number, since it uses less digits than its factorization.

8793400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9589451.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 8793400021 is about 93773.1305918705. The cubic root of 8793400021 is about 2064.0439634093.

Adding to 8793400021 its reverse (1200043978), we get a palindrome (9993443999).

The spelling of 8793400021 in words is "eight billion, seven hundred ninety-three million, four hundred thousand, twenty-one".