21383377516 has 6 divisors (see below), whose sum is σ = 37420910660. Its totient is φ = 10691688756.

The previous prime is 21383377481. The next prime is 21383377523. The reversal of 21383377516 is 61577338312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2672922186 + ... + 2672922193.

Almost surely, 2^21383377516 is an apocalyptic number.

It is an amenable number.

21383377516 is a deficient number, since it is larger than the sum of its proper divisors (16037533144).

21383377516 is a wasteful number, since it uses less digits than its factorization.

21383377516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345844383 (or 5345844381 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

The spelling of 21383377516 in words is "twenty-one billion, three hundred eighty-three million, three hundred seventy-seven thousand, five hundred sixteen".