21496971076 has 48 divisors (see below), whose sum is σ = 43275232000. Its totient is φ = 9152818560.

The previous prime is 21496971059. The next prime is 21496971077. The reversal of 21496971076 is 67017969412.

It is not an unprimeable number, because it can be changed into a prime (21496971077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7818550 + ... + 7821298.

Almost surely, 2^21496971076 is an apocalyptic number.

It is an amenable number.

21496971076 is an abundant number, since it is smaller than the sum of its proper divisors (21778260924).

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

21496971076 is a wasteful number, since it uses less digits than its factorization.

21496971076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4484 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 21496971076 in words is "twenty-one billion, four hundred ninety-six million, nine hundred seventy-one thousand, seventy-six".