21832489749 has 8 divisors (see below), whose sum is σ = 33268555840. Its totient is φ = 12475708416.

The previous prime is 21832489727. The next prime is 21832489759. The reversal of 21832489749 is 94798423812.

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

It is not a de Polignac number, because 21832489749 - 2⁷ = 21832489621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21832489759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519821164 + ... + 519821205.

It is an arithmetic number, because the mean of its divisors is an integer number (4158569480).

Almost surely, 2^21832489749 is an apocalyptic number.

It is an amenable number.

21832489749 is a deficient number, since it is larger than the sum of its proper divisors (11436066091).

21832489749 is a wasteful number, since it uses less digits than its factorization.

21832489749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039642379.

The product of its digits is 6967296, while the sum is 57.

The spelling of 21832489749 in words is "twenty-one billion, eight hundred thirty-two million, four hundred eighty-nine thousand, seven hundred forty-nine".