21140032441 has 8 divisors (see below), whose sum is σ = 23077443168. Its totient is φ = 19205220000.

The previous prime is 21140032421. The next prime is 21140032447. The reversal of 21140032441 is 14423004112.

It is a happy number.

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 21140032441 - 2¹¹ = 21140030393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140032447) 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, 632535 + ... + 665116.

It is an arithmetic number, because the mean of its divisors is an integer number (2884680396).

Almost surely, 2^21140032441 is an apocalyptic number.

It is an amenable number.

21140032441 is a deficient number, since it is larger than the sum of its proper divisors (1937410727).

21140032441 is a wasteful number, since it uses less digits than its factorization.

21140032441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299143.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21140032441 its reverse (14423004112), we get a palindrome (35563036553).

The spelling of 21140032441 in words is "twenty-one billion, one hundred forty million, thirty-two thousand, four hundred forty-one".