21740243696 has 20 divisors (see below), whose sum is σ = 42124451184. Its totient is φ = 10869417600.

The previous prime is 21740243677. The next prime is 21740243737. The reversal of 21740243696 is 69634204712.

It is a super-2 number, since 2×21740243696² (a number of 21 digits) contains 22 as substring.

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, 285341 + ... + 353411.

Almost surely, 2^21740243696 is an apocalyptic number.

It is an amenable number.

21740243696 is a deficient number, since it is larger than the sum of its proper divisors (20384207488).

21740243696 is a wasteful number, since it uses less digits than its factorization.

21740243696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88040 (or 88034 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 21740243696 in words is "twenty-one billion, seven hundred forty million, two hundred forty-three thousand, six hundred ninety-six".