21435643162 has 8 divisors (see below), whose sum is σ = 34044845076. Its totient is φ = 10087361472.

The previous prime is 21435643013. The next prime is 21435643171. The reversal of 21435643162 is 26134653412.

It can be written as a sum of positive squares in 2 ways, for example, as 20918126161 + 517517001 = 144631^2 + 22749^2 .

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

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, 315230013 + ... + 315230080.

Almost surely, 2^21435643162 is an apocalyptic number.

21435643162 is a deficient number, since it is larger than the sum of its proper divisors (12609201914).

21435643162 is a wasteful number, since it uses less digits than its factorization.

21435643162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630460112.

The product of its digits is 103680, while the sum is 37.

The spelling of 21435643162 in words is "twenty-one billion, four hundred thirty-five million, six hundred forty-three thousand, one hundred sixty-two".