20051025 has 24 divisors (see below), whose sum is σ = 33491904. Its totient is φ = 10584000.

The previous prime is 20050981. The next prime is 20051047. The reversal of 20051025 is 52015002.

It is not a de Polignac number, because 20051025 - 2¹⁷ = 19919953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20050995 and 20051013.

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, 6252 + ... + 8898.

It is an arithmetic number, because the mean of its divisors is an integer number (1395496).

Almost surely, 2^20051025 is an apocalyptic number.

20051025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20051025 is a deficient number, since it is larger than the sum of its proper divisors (13440879).

20051025 is a wasteful number, since it uses less digits than its factorization.

20051025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2756 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20051025 is about 4477.8370894886. The cubic root of 20051025 is about 271.6724042264.

Adding to 20051025 its reverse (52015002), we get a palindrome (72066027).

The spelling of 20051025 in words is "twenty million, fifty-one thousand, twenty-five".