21544503514 has 16 divisors (see below), whose sum is σ = 32509004616. Its totient is φ = 10708264000.

The previous prime is 21544503493. The next prime is 21544503553. The reversal of 21544503514 is 41530544512.

It can be written as a sum of positive squares in 4 ways, for example, as 21408664489 + 135839025 = 146317^2 + 11655^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21544503514.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442164 + ... + 488464.

Almost surely, 2^21544503514 is an apocalyptic number.

21544503514 is a deficient number, since it is larger than the sum of its proper divisors (10964501102).

21544503514 is a wasteful number, since it uses less digits than its factorization.

21544503514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47681.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 21544503514 in words is "twenty-one billion, five hundred forty-four million, five hundred three thousand, five hundred fourteen".