21443515442054 has 8 divisors (see below), whose sum is σ = 32166213303528. Its totient is φ = 10721444340880.

The previous prime is 21443515442003. The next prime is 21443515442077. The reversal of 21443515442054 is 45024451534412.

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

It is a junction number, because it is equal to n+sod(n) for n = 21443515441996 and 21443515442014.

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, 156604532 + ... + 156741399.

It is an arithmetic number, because the mean of its divisors is an integer number (4020776662941).

Almost surely, 2^{21443515442054} is an apocalyptic number.

21443515442054 is a deficient number, since it is larger than the sum of its proper divisors (10722697861474).

21443515442054 is a wasteful number, since it uses less digits than its factorization.

21443515442054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313380150.

The product of its (nonzero) digits is 1536000, while the sum is 44.

Adding to 21443515442054 its reverse (45024451534412), we get a palindrome (66467966976466).

The spelling of 21443515442054 in words is "twenty-one trillion, four hundred forty-three billion, five hundred fifteen million, four hundred forty-two thousand, fifty-four".