21888673808 has 40 divisors (see below), whose sum is σ = 43958174592. Its totient is φ = 10551581568.

The previous prime is 21888673753. The next prime is 21888673811. The reversal of 21888673808 is 80837688812.

It is a super-2 number, since 2×21888673808² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166835 + ... + 267602.

Almost surely, 2^21888673808 is an apocalyptic number.

It is an amenable number.

21888673808 is an abundant number, since it is smaller than the sum of its proper divisors (22069500784).

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

21888673808 is a wasteful number, since it uses less digits than its factorization.

21888673808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434559 (or 434553 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 59.

The spelling of 21888673808 in words is "twenty-one billion, eight hundred eighty-eight million, six hundred seventy-three thousand, eight hundred eight".