21370786797 has 8 divisors (see below), whose sum is σ = 28837688544. Its totient is φ = 14075538128.

The previous prime is 21370786793. The next prime is 21370786813. The reversal of 21370786797 is 79768707312.

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 21370786797 - 2² = 21370786793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370786793) 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, 42912978 + ... + 42913475.

It is an arithmetic number, because the mean of its divisors is an integer number (3604711068).

Almost surely, 2^21370786797 is an apocalyptic number.

It is an amenable number.

21370786797 is a deficient number, since it is larger than the sum of its proper divisors (7466901747).

21370786797 is an equidigital number, since it uses as much as digits as its factorization.

21370786797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85826539.

The product of its (nonzero) digits is 6223392, while the sum is 57.

The spelling of 21370786797 in words is "twenty-one billion, three hundred seventy million, seven hundred eighty-six thousand, seven hundred ninety-seven".