20205205022 has 4 divisors (see below), whose sum is σ = 30307807536. Its totient is φ = 10102602510.

The previous prime is 20205205021. The next prime is 20205205037. The reversal of 20205205022 is 22050250202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22050250202 = 2 ⋅11025125101.

It is a junction number, because it is equal to n+sod(n) for n = 20205204985 and 20205205003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205205021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051301254 + ... + 5051301257.

It is an arithmetic number, because the mean of its divisors is an integer number (7576951884).

Almost surely, 2^20205205022 is an apocalyptic number.

20205205022 is a deficient number, since it is larger than the sum of its proper divisors (10102602514).

20205205022 is a wasteful number, since it uses less digits than its factorization.

20205205022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102602513.

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 20205205022 its reverse (22050250202), we get a palindrome (42255455224).

The spelling of 20205205022 in words is "twenty billion, two hundred five million, two hundred five thousand, twenty-two".