21544552334 has 8 divisors (see below), whose sum is σ = 32317566960. Its totient is φ = 10772030016.

The previous prime is 21544552307. The next prime is 21544552349. The reversal of 21544552334 is 43325544512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19247 + ... + 208469.

It is an arithmetic number, because the mean of its divisors is an integer number (4039695870).

Almost surely, 2^21544552334 is an apocalyptic number.

21544552334 is a deficient number, since it is larger than the sum of its proper divisors (10773014626).

21544552334 is a wasteful number, since it uses less digits than its factorization.

21544552334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246154.

The product of its digits is 288000, while the sum is 38.

The spelling of 21544552334 in words is "twenty-one billion, five hundred forty-four million, five hundred fifty-two thousand, three hundred thirty-four".