20210887225 has 9 divisors (see below), whose sum is σ = 25062381613. Its totient is φ = 16168141120.

The previous prime is 20210887187. The next prime is 20210887247. The reversal of 20210887225 is 52278801202.

It is a happy number.

The square root of 20210887225 is 142165.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1256206249 + 18954680976 = 35443^2 + 137676^2 .

It is not a de Polignac number, because 20210887225 - 2⁷ = 20210887097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 696609 + ... + 725041.

Almost surely, 2^20210887225 is an apocalyptic number.

20210887225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20210887225 is the 142165-th square number.

20210887225 is the 71083-rd centered octagonal number.

It is an amenable number.

20210887225 is a deficient number, since it is larger than the sum of its proper divisors (4851494388).

20210887225 is an frugal number, since it uses more digits than its factorization.

20210887225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56876 (or 28438 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 20210887225 in words is "twenty billion, two hundred ten million, eight hundred eighty-seven thousand, two hundred twenty-five".