20198025 has 48 divisors (see below), whose sum is σ = 38747520. Its totient is φ = 10296000.

The previous prime is 20197997. The next prime is 20198033. The reversal of 20198025 is 52089102.

It is not a de Polignac number, because 20198025 - 2⁷ = 20197897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20198025.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14875 + ... + 16175.

It is an arithmetic number, because the mean of its divisors is an integer number (807240).

Almost surely, 2^20198025 is an apocalyptic number.

20198025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20198025 is a deficient number, since it is larger than the sum of its proper divisors (18549495).

20198025 is a wasteful number, since it uses less digits than its factorization.

20198025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1332 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20198025 is about 4494.2212896118. The cubic root of 20198025 is about 272.3346919840.

The spelling of 20198025 in words is "twenty million, one hundred ninety-eight thousand, twenty-five".