21773601336 has 16 divisors (see below), whose sum is σ = 54434003400. Its totient is φ = 7257867104.

The previous prime is 21773601313. The next prime is 21773601379. The reversal of 21773601336 is 63310637712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21773601294 and 21773601303.

It is a congruent number.

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, 453616671 + ... + 453616718.

Almost surely, 2^21773601336 is an apocalyptic number.

It is an amenable number.

21773601336 is an abundant number, since it is smaller than the sum of its proper divisors (32660402064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21773601336 is a wasteful number, since it uses less digits than its factorization.

21773601336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907233398 (or 907233394 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 39.

The spelling of 21773601336 in words is "twenty-one billion, seven hundred seventy-three million, six hundred one thousand, three hundred thirty-six".