21054034441 has 8 divisors (see below), whose sum is σ = 23057410464. Its totient is φ = 19065553920.

The previous prime is 21054034427. The next prime is 21054034459. The reversal of 21054034441 is 14443045012.

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 21054034441 - 2²³ = 21045645833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21054031441) 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, 3720915 + ... + 3726568.

It is an arithmetic number, because the mean of its divisors is an integer number (2882176308).

Almost surely, 2^21054034441 is an apocalyptic number.

It is an amenable number.

21054034441 is a deficient number, since it is larger than the sum of its proper divisors (2003376023).

21054034441 is a wasteful number, since it uses less digits than its factorization.

21054034441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7447751.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 21054034441 its reverse (14443045012), we get a palindrome (35497079453).

The spelling of 21054034441 in words is "twenty-one billion, fifty-four million, thirty-four thousand, four hundred forty-one".