21704076016 has 20 divisors (see below), whose sum is σ = 48059025712. Its totient is φ = 9301746816.

The previous prime is 21704075983. The next prime is 21704076049. The reversal of 21704076016 is 61067040712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21704075983) and next prime (21704076049).

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, 96893085 + ... + 96893308.

Almost surely, 2^21704076016 is an apocalyptic number.

It is an amenable number.

21704076016 is an abundant number, since it is smaller than the sum of its proper divisors (26354949696).

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

21704076016 is a wasteful number, since it uses less digits than its factorization.

21704076016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193786408 (or 193786402 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 21704076016 in words is "twenty-one billion, seven hundred four million, seventy-six thousand, sixteen".