21768262024 has 16 divisors (see below), whose sum is σ = 41022679500. Its totient is φ = 10828880832.

The previous prime is 21768262013. The next prime is 21768262039. The reversal of 21768262024 is 42026286712.

It can be written as a sum of positive squares in 2 ways, for example, as 14937239524 + 6831022500 = 122218^2 + 82650^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6904599 + ... + 6907750.

Almost surely, 2^21768262024 is an apocalyptic number.

It is an amenable number.

21768262024 is a deficient number, since it is larger than the sum of its proper divisors (19254417476).

21768262024 is a wasteful number, since it uses less digits than its factorization.

21768262024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13812552 (or 13812548 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 21768262024 in words is "twenty-one billion, seven hundred sixty-eight million, two hundred sixty-two thousand, twenty-four".