21347733716 has 12 divisors (see below), whose sum is σ = 37371012000. Its totient is φ = 10670301720.

The previous prime is 21347733703. The next prime is 21347733793. The reversal of 21347733716 is 61733774312.

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, 877790 + ... + 901781.

It is an arithmetic number, because the mean of its divisors is an integer number (3114251000).

Almost surely, 2^21347733716 is an apocalyptic number.

It is an amenable number.

21347733716 is a deficient number, since it is larger than the sum of its proper divisors (16023278284).

21347733716 is a wasteful number, since it uses less digits than its factorization.

21347733716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782574 (or 1782572 counting only the distinct ones).

The product of its digits is 444528, while the sum is 44.

The spelling of 21347733716 in words is "twenty-one billion, three hundred forty-seven million, seven hundred thirty-three thousand, seven hundred sixteen".