21859626652 has 6 divisors (see below), whose sum is σ = 38254346648. Its totient is φ = 10929813324.

The previous prime is 21859626643. The next prime is 21859626671. The reversal of 21859626652 is 25662695812.

It is a self number, because there is not a number n which added to its sum of digits gives 21859626652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2732453328 + ... + 2732453335.

Almost surely, 2^21859626652 is an apocalyptic number.

It is an amenable number.

21859626652 is a deficient number, since it is larger than the sum of its proper divisors (16394719996).

21859626652 is a wasteful number, since it uses less digits than its factorization.

21859626652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464906667 (or 5464906665 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The spelling of 21859626652 in words is "twenty-one billion, eight hundred fifty-nine million, six hundred twenty-six thousand, six hundred fifty-two".