20502425 has 24 divisors (see below), whose sum is σ = 28346400. Its totient is φ = 14618880.

The previous prime is 20502401. The next prime is 20502479. The reversal of 20502425 is 52420502.

It is not a de Polignac number, because 20502425 - 2⁸ = 20502169 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20502397 and 20502406.

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, 6806 + ... + 9344.

It is an arithmetic number, because the mean of its divisors is an integer number (1181100).

Almost surely, 2^20502425 is an apocalyptic number.

20502425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20502425 is a deficient number, since it is larger than the sum of its proper divisors (7843975).

20502425 is a wasteful number, since it uses less digits than its factorization.

20502425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20502425 is about 4527.9603576003. The cubic root of 20502425 is about 273.6959749660.

Adding to 20502425 its reverse (52420502), we get a palindrome (72922927).

The spelling of 20502425 in words is "twenty million, five hundred two thousand, four hundred twenty-five".