22150421444 has 48 divisors (see below), whose sum is σ = 41536696320. Its totient is φ = 10312552320.

The previous prime is 22150421417. The next prime is 22150421471. The reversal of 22150421444 is 44412405122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22150421417) and next prime (22150421471).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1043117 + ... + 1064139.

It is an arithmetic number, because the mean of its divisors is an integer number (865347840).

Almost surely, 2^22150421444 is an apocalyptic number.

It is an amenable number.

22150421444 is a deficient number, since it is larger than the sum of its proper divisors (19386274876).

22150421444 is a wasteful number, since it uses less digits than its factorization.

22150421444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21380 (or 21378 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 22150421444 its reverse (44412405122), we get a palindrome (66562826566).

The spelling of 22150421444 in words is "twenty-two billion, one hundred fifty million, four hundred twenty-one thousand, four hundred forty-four".