21763734434 has 16 divisors (see below), whose sum is σ = 35159809272. Its totient is φ = 10043941248.

The previous prime is 21763734403. The next prime is 21763734449. The reversal of 21763734434 is 43443736712.

It can be written as a sum of positive squares in 4 ways, for example, as 13559903809 + 8203830625 = 116447^2 + 90575^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354092 + ... + 410984.

Almost surely, 2^21763734434 is an apocalyptic number.

21763734434 is a deficient number, since it is larger than the sum of its proper divisors (13396074838).

21763734434 is a wasteful number, since it uses less digits than its factorization.

21763734434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71621.

The product of its digits is 1016064, while the sum is 44.

The spelling of 21763734434 in words is "twenty-one billion, seven hundred sixty-three million, seven hundred thirty-four thousand, four hundred thirty-four".