21251423535352 has 16 divisors (see below), whose sum is σ = 40598238358440. Its totient is φ = 10425226639776.

The previous prime is 21251423535343. The next prime is 21251423535413. The reversal of 21251423535352 is 25353532415212.

It is a junction number, because it is equal to n+sod(n) for n = 21251423535299 and 21251423535308.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25060640538 + ... + 25060641385.

Almost surely, 2^{21251423535352} is an apocalyptic number.

It is an amenable number.

21251423535352 is a deficient number, since it is larger than the sum of its proper divisors (19346814823088).

21251423535352 is a wasteful number, since it uses less digits than its factorization.

21251423535352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50121281982 (or 50121281978 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 43.

The spelling of 21251423535352 in words is "twenty-one trillion, two hundred fifty-one billion, four hundred twenty-three million, five hundred thirty-five thousand, three hundred fifty-two".