21622035206550 has 96 divisors (see below), whose sum is σ = 54628171144704. Its totient is φ = 5658193872000.

The previous prime is 21622035206539. The next prime is 21622035206561. The reversal of 21622035206550 is 5560253022612.

It is an interprime number because it is at equal distance from previous prime (21622035206539) and next prime (21622035206561).

It is a junction number, because it is equal to n+sod(n) for n = 21622035206499 and 21622035206508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1202277 + ... + 6685023.

It is an arithmetic number, because the mean of its divisors is an integer number (569043449424).

Almost surely, 2^{21622035206550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21622035206550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27314085572352).

21622035206550 is an abundant number, since it is smaller than the sum of its proper divisors (33006135938154).

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

21622035206550 is a wasteful number, since it uses less digits than its factorization.

21622035206550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483254 (or 5483249 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 21622035206550 in words is "twenty-one trillion, six hundred twenty-two billion, thirty-five million, two hundred six thousand, five hundred fifty".