21370786796 has 6 divisors (see below), whose sum is σ = 37398876900. Its totient is φ = 10685393396.

The previous prime is 21370786793. The next prime is 21370786813. The reversal of 21370786796 is 69768707312.

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 as a sum of consecutive naturals, namely, 2671348346 + ... + 2671348353.

It is an arithmetic number, because the mean of its divisors is an integer number (6233146150).

Almost surely, 2^21370786796 is an apocalyptic number.

It is an amenable number.

21370786796 is a deficient number, since it is larger than the sum of its proper divisors (16028090104).

21370786796 is a wasteful number, since it uses less digits than its factorization.

21370786796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5342696703 (or 5342696701 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 21370786796 in words is "twenty-one billion, three hundred seventy million, seven hundred eighty-six thousand, seven hundred ninety-six".