21799611443 has 8 divisors (see below), whose sum is σ = 22220990400. Its totient is φ = 21382012008.

The previous prime is 21799611413. The next prime is 21799611467. The reversal of 21799611443 is 34411699712.

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

It is a cyclic number.

It is not a de Polignac number, because 21799611443 - 2¹⁶ = 21799545907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21799611403) 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, 933233 + ... + 956306.

It is an arithmetic number, because the mean of its divisors is an integer number (2777623800).

Almost surely, 2^21799611443 is an apocalyptic number.

21799611443 is a deficient number, since it is larger than the sum of its proper divisors (421378957).

21799611443 is a wasteful number, since it uses less digits than its factorization.

21799611443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889761.

The product of its digits is 326592, while the sum is 47.

The spelling of 21799611443 in words is "twenty-one billion, seven hundred ninety-nine million, six hundred eleven thousand, four hundred forty-three".