21443544510554 has 16 divisors (see below), whose sum is σ = 34470938769408. Its totient is φ = 9978429642192.

The previous prime is 21443544510547. The next prime is 21443544510559. The reversal of 21443544510554 is 45501544534412.

It is a super-2 number, since 2×21443544510554² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21443544510499 and 21443544510508.

It is not an unprimeable number, because it can be changed into a prime (21443544510559) 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, 6299511962 + ... + 6299515365.

It is an arithmetic number, because the mean of its divisors is an integer number (2154433673088).

Almost surely, 2^{21443544510554} is an apocalyptic number.

21443544510554 is a deficient number, since it is larger than the sum of its proper divisors (13027394258854).

21443544510554 is a wasteful number, since it uses less digits than its factorization.

21443544510554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12599027389.

The product of its (nonzero) digits is 3840000, while the sum is 47.

The spelling of 21443544510554 in words is "twenty-one trillion, four hundred forty-three billion, five hundred forty-four million, five hundred ten thousand, five hundred fifty-four".