21758425076 has 6 divisors (see below), whose sum is σ = 38077243890. Its totient is φ = 10879212536.

The previous prime is 21758425057. The next prime is 21758425079. The reversal of 21758425076 is 67052485712.

It can be written as a sum of positive squares in only one way, i.e., 20585362576 + 1173062500 = 143476^2 + 34250^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21758425076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21758425079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2719803131 + ... + 2719803138.

It is an arithmetic number, because the mean of its divisors is an integer number (6346207315).

Almost surely, 2^21758425076 is an apocalyptic number.

It is an amenable number.

21758425076 is a deficient number, since it is larger than the sum of its proper divisors (16318818814).

21758425076 is a wasteful number, since it uses less digits than its factorization.

21758425076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439606273 (or 5439606271 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 21758425076 in words is "twenty-one billion, seven hundred fifty-eight million, four hundred twenty-five thousand, seventy-six".