22021613550 has 36 divisors (see below), whose sum is σ = 59164736280. Its totient is φ = 5872430160.

The previous prime is 22021613501. The next prime is 22021613659. The reversal of 22021613550 is 5531612022.

It is a happy number.

22021613550 is a `hidden beast` number, since 2 + 20 + 21 + 613 + 5 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24468010 + ... + 24468909.

Almost surely, 2^22021613550 is an apocalyptic number.

22021613550 is an abundant number, since it is smaller than the sum of its proper divisors (37143122730).

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

22021613550 is a wasteful number, since it uses less digits than its factorization.

22021613550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48936937 (or 48936929 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 22021613550 in words is "twenty-two billion, twenty-one million, six hundred thirteen thousand, five hundred fifty".