21888673798 has 32 divisors (see below), whose sum is σ = 33715779552. Its totient is φ = 10654368000.

The previous prime is 21888673753. The next prime is 21888673811. The reversal of 21888673798 is 89737688812.

It is a super-2 number, since 2×21888673798² (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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4915473 + ... + 4919923.

It is an arithmetic number, because the mean of its divisors is an integer number (1053618111).

Almost surely, 2^21888673798 is an apocalyptic number.

21888673798 is a deficient number, since it is larger than the sum of its proper divisors (11827105754).

21888673798 is a wasteful number, since it uses less digits than its factorization.

21888673798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920.

The product of its digits is 65028096, while the sum is 67.

The spelling of 21888673798 in words is "twenty-one billion, eight hundred eighty-eight million, six hundred seventy-three thousand, seven hundred ninety-eight".