20221838550 has 72 divisors (see below), whose sum is σ = 55220059440. Its totient is φ = 5304081600.

The previous prime is 20221838543. The next prime is 20221838597. The reversal of 20221838550 is 5583812202.

20221838550 is a `hidden beast` number, since 2 + 0 + 2 + 21 + 83 + 8 + 550 = 666.

It is a super-2 number, since 2×20221838550² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 340890 + ... + 395789.

It is an arithmetic number, because the mean of its divisors is an integer number (766945270).

Almost surely, 2^20221838550 is an apocalyptic number.

20221838550 is an abundant number, since it is smaller than the sum of its proper divisors (34998220890).

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

20221838550 is a wasteful number, since it uses less digits than its factorization.

20221838550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736758 (or 736750 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 20221838550 in words is "twenty billion, two hundred twenty-one million, eight hundred thirty-eight thousand, five hundred fifty".