21750241534 has 32 divisors (see below), whose sum is σ = 37479303936. Its totient is φ = 9273304320.

The previous prime is 21750241511. The next prime is 21750241537. The reversal of 21750241534 is 43514205712.

It is a self number, because there is not a number n which added to its sum of digits gives 21750241534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21750241537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7222089 + ... + 7225099.

It is an arithmetic number, because the mean of its divisors is an integer number (1171228248).

Almost surely, 2^21750241534 is an apocalyptic number.

21750241534 is a deficient number, since it is larger than the sum of its proper divisors (15729062402).

21750241534 is a wasteful number, since it uses less digits than its factorization.

21750241534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 21750241534 in words is "twenty-one billion, seven hundred fifty million, two hundred forty-one thousand, five hundred thirty-four".