21445077336 has 16 divisors (see below), whose sum is σ = 53612693400. Its totient is φ = 7148359104.

The previous prime is 21445077317. The next prime is 21445077349. The reversal of 21445077336 is 63377054412.

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, 446772421 + ... + 446772468.

Almost surely, 2^21445077336 is an apocalyptic number.

It is an amenable number.

21445077336 is an abundant number, since it is smaller than the sum of its proper divisors (32167616064).

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

21445077336 is a wasteful number, since it uses less digits than its factorization.

21445077336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893544898 (or 893544894 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 21445077336 in words is "twenty-one billion, four hundred forty-five million, seventy-seven thousand, three hundred thirty-six".