20022243550 has 48 divisors (see below), whose sum is σ = 37922572800. Its totient is φ = 7863596640.

The previous prime is 20022243541. The next prime is 20022243551. The reversal of 20022243550 is 5534222002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022243551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661651 + ... + 691249.

It is an arithmetic number, because the mean of its divisors is an integer number (790053600).

Almost surely, 2^20022243550 is an apocalyptic number.

20022243550 is a deficient number, since it is larger than the sum of its proper divisors (17900329250).

20022243550 is a wasteful number, since it uses less digits than its factorization.

20022243550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29857 (or 29852 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20022243550 its reverse (5534222002), we get a palindrome (25556465552).

The spelling of 20022243550 in words is "twenty billion, twenty-two million, two hundred forty-three thousand, five hundred fifty".