20553025 has 12 divisors (see below), whose sum is σ = 26365500. Its totient is φ = 15874880.

The previous prime is 20553023. The next prime is 20553047. The reversal of 20553025 is 52035502.

It can be written as a sum of positive squares in 6 ways, for example, as 3504384 + 17048641 = 1872^2 + 4129^2 .

It is not a de Polignac number, because 20553025 - 2¹ = 20553023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20552987 and 20553005.

It is not an unprimeable number, because it can be changed into a prime (20553023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13450 + ... + 14899.

It is an arithmetic number, because the mean of its divisors is an integer number (2197125).

Almost surely, 2^20553025 is an apocalyptic number.

20553025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20553025 is a deficient number, since it is larger than the sum of its proper divisors (5812475).

20553025 is a wasteful number, since it uses less digits than its factorization.

20553025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28388 (or 28383 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20553025 is about 4533.5444191052. The cubic root of 20553025 is about 273.9209506099.

Adding to 20553025 its reverse (52035502), we get a palindrome (72588527).

The spelling of 20553025 in words is "twenty million, five hundred fifty-three thousand, twenty-five".