21875427908 has 24 divisors (see below), whose sum is σ = 39385645152. Its totient is φ = 10626859584.

The previous prime is 21875427907. The next prime is 21875427911. The reversal of 21875427908 is 80972457812.

It is a self number, because there is not a number n which added to its sum of digits gives 21875427908.

It is not an unprimeable number, because it can be changed into a prime (21875427901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539510 + ... + 578637.

It is an arithmetic number, because the mean of its divisors is an integer number (1641068548).

Almost surely, 2^21875427908 is an apocalyptic number.

It is an amenable number.

21875427908 is a deficient number, since it is larger than the sum of its proper divisors (17510217244).

21875427908 is a wasteful number, since it uses less digits than its factorization.

21875427908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118291 (or 1118289 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 21875427908 in words is "twenty-one billion, eight hundred seventy-five million, four hundred twenty-seven thousand, nine hundred eight".