20223521225 has 6 divisors (see below), whose sum is σ = 25077166350. Its totient is φ = 16178816960.

The previous prime is 20223521177. The next prime is 20223521239. The reversal of 20223521225 is 52212532202.

It can be written as a sum of positive squares in 3 ways, for example, as 6245424784 + 13978096441 = 79028^2 + 118229^2 .

It is not a de Polignac number, because 20223521225 - 2¹⁴ = 20223504841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20223521194 and 20223521203.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404470400 + ... + 404470449.

It is an arithmetic number, because the mean of its divisors is an integer number (4179527725).

Almost surely, 2^20223521225 is an apocalyptic number.

20223521225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20223521225 is a deficient number, since it is larger than the sum of its proper divisors (4853645125).

20223521225 is an equidigital number, since it uses as much as digits as its factorization.

20223521225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808940859 (or 808940854 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The spelling of 20223521225 in words is "twenty billion, two hundred twenty-three million, five hundred twenty-one thousand, two hundred twenty-five".