21794884838 has 16 divisors (see below), whose sum is σ = 35145169920. Its totient is φ = 10104234696.

The previous prime is 21794884829. The next prime is 21794884889. The reversal of 21794884838 is 83848849712.

It is a congruent number.

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, 6099806 + ... + 6103377.

It is an arithmetic number, because the mean of its divisors is an integer number (2196573120).

Almost surely, 2^21794884838 is an apocalyptic number.

21794884838 is a deficient number, since it is larger than the sum of its proper divisors (13350285082).

21794884838 is a wasteful number, since it uses less digits than its factorization.

21794884838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12203251.

The product of its digits is 24772608, while the sum is 62.

The spelling of 21794884838 in words is "twenty-one billion, seven hundred ninety-four million, eight hundred eighty-four thousand, eight hundred thirty-eight".