21227363757 has 24 divisors (see below), whose sum is σ = 32228449344. Its totient is φ = 13437466944.

The previous prime is 21227363747. The next prime is 21227363761. The reversal of 21227363757 is 75736372212.

It is a happy number.

21227363757 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 7 + 3 + 637 + 5 + 7 = 666.

It is not a de Polignac number, because 21227363757 - 2²⁰ = 21226315181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227363737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345903 + ... + 402620.

It is an arithmetic number, because the mean of its divisors is an integer number (1342852056).

Almost surely, 2^21227363757 is an apocalyptic number.

It is an amenable number.

21227363757 is a deficient number, since it is larger than the sum of its proper divisors (11001085587).

21227363757 is a wasteful number, since it uses less digits than its factorization.

21227363757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748689 (or 748686 counting only the distinct ones).

The product of its digits is 740880, while the sum is 45.

The spelling of 21227363757 in words is "twenty-one billion, two hundred twenty-seven million, three hundred sixty-three thousand, seven hundred fifty-seven".