21552622748 has 6 divisors (see below), whose sum is σ = 37717089816. Its totient is φ = 10776311372.

The previous prime is 21552622747. The next prime is 21552622753. The reversal of 21552622748 is 84722625512.

It is a junction number, because it is equal to n+sod(n) for n = 21552622699 and 21552622708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552622747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2694077840 + ... + 2694077847.

It is an arithmetic number, because the mean of its divisors is an integer number (6286181636).

Almost surely, 2^21552622748 is an apocalyptic number.

It is an amenable number.

21552622748 is a deficient number, since it is larger than the sum of its proper divisors (16164467068).

21552622748 is a wasteful number, since it uses less digits than its factorization.

21552622748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388155691 (or 5388155689 counting only the distinct ones).

The product of its digits is 537600, while the sum is 44.

The spelling of 21552622748 in words is "twenty-one billion, five hundred fifty-two million, six hundred twenty-two thousand, seven hundred forty-eight".