21353433020404 has 12 divisors (see below), whose sum is σ = 37368587251744. Its totient is φ = 10676693805624.

The previous prime is 21353433020401. The next prime is 21353433020411. The reversal of 21353433020404 is 40402033435312.

It is a self number, because there is not a number n which added to its sum of digits gives 21353433020404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353433020401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3464274 + ... + 7396489.

Almost surely, 2^{21353433020404} is an apocalyptic number.

It is an amenable number.

21353433020404 is a deficient number, since it is larger than the sum of its proper divisors (16015154231340).

21353433020404 is a wasteful number, since it uses less digits than its factorization.

21353433020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11352294 (or 11352292 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 34.

Adding to 21353433020404 its reverse (40402033435312), we get a palindrome (61755466455716).

The spelling of 21353433020404 in words is "twenty-one trillion, three hundred fifty-three billion, four hundred thirty-three million, twenty thousand, four hundred four".