21695312077826 has 8 divisors (see below), whose sum is σ = 32558546374860. Its totient is φ = 10842463286208.

The previous prime is 21695312077763. The next prime is 21695312077861. The reversal of 21695312077826 is 62877021359612.

It can be written as a sum of positive squares in 2 ways, for example, as 20608195140625 + 1087116937201 = 4539625^2 + 1042649^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2596371131 + ... + 2596379486.

Almost surely, 2^{21695312077826} is an apocalyptic number.

21695312077826 is a deficient number, since it is larger than the sum of its proper divisors (10863234297034).

21695312077826 is a wasteful number, since it uses less digits than its factorization.

21695312077826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192752708.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 21695312077826 in words is "twenty-one trillion, six hundred ninety-five billion, three hundred twelve million, seventy-seven thousand, eight hundred twenty-six".