21352766798 has 16 divisors (see below), whose sum is σ = 34945610544. Its totient is φ = 9704492160.

The previous prime is 21352766731. The next prime is 21352766801. The reversal of 21352766798 is 89766725312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111686 + ... + 234902.

It is an arithmetic number, because the mean of its divisors is an integer number (2184100659).

Almost surely, 2^21352766798 is an apocalyptic number.

21352766798 is a deficient number, since it is larger than the sum of its proper divisors (13592843746).

21352766798 is a wasteful number, since it uses less digits than its factorization.

21352766798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131107.

The product of its digits is 7620480, while the sum is 56.

The spelling of 21352766798 in words is "twenty-one billion, three hundred fifty-two million, seven hundred sixty-six thousand, seven hundred ninety-eight".