20047225 has 24 divisors (see below), whose sum is σ = 27319680. Its totient is φ = 14472000.

The previous prime is 20047201. The next prime is 20047241. The reversal of 20047225 is 52274002.

It is not a de Polignac number, because 20047225 - 2²¹ = 17950073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20047196 and 20047205.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73840 + ... + 74110.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^20047225 is an apocalyptic number.

20047225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20047225 is a deficient number, since it is larger than the sum of its proper divisors (7272455).

20047225 is a wasteful number, since it uses less digits than its factorization.

20047225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20047225 is about 4477.4127573857. The cubic root of 20047225 is about 271.6552410081.

It can be divided in two parts, 2004 and 7225, that added together give a palindrome (9229).

The spelling of 20047225 in words is "twenty million, forty-seven thousand, two hundred twenty-five".