21043232503254 has 32 divisors (see below), whose sum is σ = 50359872659040. Its totient is φ = 6474840770016.

The previous prime is 21043232503247. The next prime is 21043232503331. The reversal of 21043232503254 is 45230523234012.

21043232503254 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 3 + 2 + 325 + 0 + 325 + 4 = 666.

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 15 ways as a sum of consecutive naturals, for example, 14988056637 + ... + 14988058040.

It is an arithmetic number, because the mean of its divisors is an integer number (1573746020595).

Almost surely, 2^{21043232503254} is an apocalyptic number.

21043232503254 is an abundant number, since it is smaller than the sum of its proper divisors (29316640155786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21043232503254 is a wasteful number, since it uses less digits than its factorization.

21043232503254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29976114701 (or 29976114695 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 21043232503254 its reverse (45230523234012), we get a palindrome (66273755737266).

The spelling of 21043232503254 in words is "twenty-one trillion, forty-three billion, two hundred thirty-two million, five hundred three thousand, two hundred fifty-four".