21435253412 has 12 divisors (see below), whose sum is σ = 37547460300. Its totient is φ = 10707407616.

The previous prime is 21435253393. The next prime is 21435253429.

21435253412 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 9046672996 + 12388580416 = 95114^2 + 111304^2 .

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, 2550053 + ... + 2558444.

It is an arithmetic number, because the mean of its divisors is an integer number (3128955025).

Almost surely, 2^21435253412 is an apocalyptic number.

It is an amenable number.

21435253412 is a deficient number, since it is larger than the sum of its proper divisors (16112206888).

21435253412 is a wasteful number, since it uses less digits than its factorization.

21435253412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109550 (or 5109548 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The spelling of 21435253412 in words is "twenty-one billion, four hundred thirty-five million, two hundred fifty-three thousand, four hundred twelve".