20553500122 has 4 divisors (see below), whose sum is σ = 30830250186. Its totient is φ = 10276750060.

The previous prime is 20553500119. The next prime is 20553500129. The reversal of 20553500122 is 22100535502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16682047281 + 3871452841 = 129159^2 + 62221^2 .

It is not an unprimeable number, because it can be changed into a prime (20553500129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138375029 + ... + 5138375032.

Almost surely, 2^20553500122 is an apocalyptic number.

20553500122 is a deficient number, since it is larger than the sum of its proper divisors (10276750064).

20553500122 is a wasteful number, since it uses less digits than its factorization.

20553500122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276750063.

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 20553500122 in words is "twenty billion, five hundred fifty-three million, five hundred thousand, one hundred twenty-two".