20520222025 has 12 divisors (see below), whose sum is σ = 25451894412. Its totient is φ = 16411778240.

The previous prime is 20520221993. The next prime is 20520222031. The reversal of 20520222025 is 52022202502.

It can be written as a sum of positive squares in 6 ways, for example, as 7159867456 + 13360354569 = 84616^2 + 115587^2 .

It is not a de Polignac number, because 20520222025 - 2⁵ = 20520221993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20520221987 and 20520222005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13162 + ... + 203011.

It is an arithmetic number, because the mean of its divisors is an integer number (2120991201).

Almost surely, 2^20520222025 is an apocalyptic number.

20520222025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20520222025 is a deficient number, since it is larger than the sum of its proper divisors (4931672387).

20520222025 is a wasteful number, since it uses less digits than its factorization.

20520222025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219980 (or 219975 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

Adding to 20520222025 its reverse (52022202502), we get a palindrome (72542424527).

The spelling of 20520222025 in words is "twenty billion, five hundred twenty million, two hundred twenty-two thousand, twenty-five".