21253043432402 has 8 divisors (see below), whose sum is σ = 32012952451200. Its totient is φ = 10582059282004.

The previous prime is 21253043432393. The next prime is 21253043432431. The reversal of 21253043432402 is 20423434035212.

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, 22231216502 + ... + 22231217457.

It is an arithmetic number, because the mean of its divisors is an integer number (4001619056400).

Almost surely, 2^{21253043432402} is an apocalyptic number.

21253043432402 is a deficient number, since it is larger than the sum of its proper divisors (10759909018798).

21253043432402 is a wasteful number, since it uses less digits than its factorization.

21253043432402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44462434200.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 21253043432402 its reverse (20423434035212), we get a palindrome (41676477467614).

The spelling of 21253043432402 in words is "twenty-one trillion, two hundred fifty-three billion, forty-three million, four hundred thirty-two thousand, four hundred two".