21453225374 has 48 divisors (see below), whose sum is σ = 39339775728. Its totient is φ = 8737642368.

The previous prime is 21453225371. The next prime is 21453225401. The reversal of 21453225374 is 47352235412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21453225371) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 87122 + ... + 224714.

It is an arithmetic number, because the mean of its divisors is an integer number (819578661).

Almost surely, 2^21453225374 is an apocalyptic number.

21453225374 is a deficient number, since it is larger than the sum of its proper divisors (17886550354).

21453225374 is a wasteful number, since it uses less digits than its factorization.

21453225374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137689 (or 137682 counting only the distinct ones).

The product of its digits is 201600, while the sum is 38.

The spelling of 21453225374 in words is "twenty-one billion, four hundred fifty-three million, two hundred twenty-five thousand, three hundred seventy-four".