21775061903 has 8 divisors (see below), whose sum is σ = 24906043680. Its totient is φ = 18649144800.

The previous prime is 21775061897. The next prime is 21775061951. The reversal of 21775061903 is 30916057712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21775061903 - 2⁶ = 21775061839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21775061953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256948 + ... + 1274153.

It is an arithmetic number, because the mean of its divisors is an integer number (3113255460).

Almost surely, 2^21775061903 is an apocalyptic number.

21775061903 is a deficient number, since it is larger than the sum of its proper divisors (3130981777).

21775061903 is a wasteful number, since it uses less digits than its factorization.

21775061903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532337.

The product of its (nonzero) digits is 79380, while the sum is 41.

The spelling of 21775061903 in words is "twenty-one billion, seven hundred seventy-five million, sixty-one thousand, nine hundred three".