20522204242 has 4 divisors (see below), whose sum is σ = 30783306366. Its totient is φ = 10261102120.

The previous prime is 20522204239. The next prime is 20522204243. The reversal of 20522204242 is 24240222502.

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 + 3840156961 = 129159^2 + 61969^2 .

It is not an unprimeable number, because it can be changed into a prime (20522204243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130551059 + ... + 5130551062.

Almost surely, 2^20522204242 is an apocalyptic number.

20522204242 is a deficient number, since it is larger than the sum of its proper divisors (10261102124).

20522204242 is a wasteful number, since it uses less digits than its factorization.

20522204242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261102123.

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 20522204242 its reverse (24240222502), we get a palindrome (44762426744).

The spelling of 20522204242 in words is "twenty billion, five hundred twenty-two million, two hundred four thousand, two hundred forty-two".