21788526092 has 6 divisors (see below), whose sum is σ = 38129920668. Its totient is φ = 10894263044.

The previous prime is 21788526077. The next prime is 21788526101. The reversal of 21788526092 is 29062588712.

It is a self number, because there is not a number n which added to its sum of digits gives 21788526092.

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 as a sum of consecutive naturals, namely, 2723565758 + ... + 2723565765.

It is an arithmetic number, because the mean of its divisors is an integer number (6354986778).

Almost surely, 2^21788526092 is an apocalyptic number.

It is an amenable number.

21788526092 is a deficient number, since it is larger than the sum of its proper divisors (16341394576).

21788526092 is a wasteful number, since it uses less digits than its factorization.

21788526092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447131527 (or 5447131525 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 21788526092 in words is "twenty-one billion, seven hundred eighty-eight million, five hundred twenty-six thousand, ninety-two".