21030822548 has 12 divisors (see below), whose sum is σ = 36811817952. Its totient is φ = 10513160280.

The previous prime is 21030822541. The next prime is 21030822577. The reversal of 21030822548 is 84522803012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030822541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541640 + ... + 579167.

It is an arithmetic number, because the mean of its divisors is an integer number (3067651496).

Almost surely, 2^21030822548 is an apocalyptic number.

It is an amenable number.

21030822548 is a deficient number, since it is larger than the sum of its proper divisors (15780995404).

21030822548 is a wasteful number, since it uses less digits than its factorization.

21030822548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125502 (or 1125500 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The spelling of 21030822548 in words is "twenty-one billion, thirty million, eight hundred twenty-two thousand, five hundred forty-eight".