21422030552 has 64 divisors (see below), whose sum is σ = 43625319360. Its totient is φ = 9802944000.

The previous prime is 21422030549. The next prime is 21422030557. The reversal of 21422030552 is 25503022412.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422030557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11510102 + ... + 11511962.

It is an arithmetic number, because the mean of its divisors is an integer number (681645615).

Almost surely, 2^21422030552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21422030552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21812659680).

21422030552 is an abundant number, since it is smaller than the sum of its proper divisors (22203288808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21422030552 is a wasteful number, since it uses less digits than its factorization.

21422030552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 21422030552 its reverse (25503022412), we get a palindrome (46925052964).

The spelling of 21422030552 in words is "twenty-one billion, four hundred twenty-two million, thirty thousand, five hundred fifty-two".