22021872550 has 24 divisors (see below), whose sum is σ = 40972042800. Its totient is φ = 8806306080.

The previous prime is 22021872541. The next prime is 22021872557. The reversal of 22021872550 is 5527812022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021872557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126736 + ... + 245164.

It is an arithmetic number, because the mean of its divisors is an integer number (1707168450).

Almost surely, 2^22021872550 is an apocalyptic number.

22021872550 is a deficient number, since it is larger than the sum of its proper divisors (18950170250).

22021872550 is a wasteful number, since it uses less digits than its factorization.

22021872550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122160 (or 122155 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The spelling of 22021872550 in words is "twenty-two billion, twenty-one million, eight hundred seventy-two thousand, five hundred fifty".