21488673376 has 24 divisors (see below), whose sum is σ = 42565380984. Its totient is φ = 10678417920.

The previous prime is 21488673359. The next prime is 21488673383. The reversal of 21488673376 is 67337688412.

It is a super-2 number, since 2×21488673376² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054665 + ... + 2065096.

It is an arithmetic number, because the mean of its divisors is an integer number (1773557541).

Almost surely, 2^21488673376 is an apocalyptic number.

It is an amenable number.

21488673376 is a deficient number, since it is larger than the sum of its proper divisors (21076707608).

21488673376 is a wasteful number, since it uses less digits than its factorization.

21488673376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119934 (or 4119926 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 21488673376 in words is "twenty-one billion, four hundred eighty-eight million, six hundred seventy-three thousand, three hundred seventy-six".