20002425 has 24 divisors (see below), whose sum is σ = 33289536. Its totient is φ = 10597440.

The previous prime is 20002417. The next prime is 20002429. The reversal of 20002425 is 52420002.

20002425 = 179² + 180² + ... + 403².

It is not a de Polignac number, because 20002425 - 2³ = 20002417 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20002429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11727 + ... + 13323.

It is an arithmetic number, because the mean of its divisors is an integer number (1387064).

Almost surely, 2^20002425 is an apocalyptic number.

20002425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20002425 is a deficient number, since it is larger than the sum of its proper divisors (13287111).

20002425 is a wasteful number, since it uses less digits than its factorization.

20002425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20002425 is about 4472.4070700239. The cubic root of 20002425 is about 271.4527319873.

Adding to 20002425 its reverse (52420002), we get a palindrome (72422427).

The spelling of 20002425 in words is "twenty million, two thousand, four hundred twenty-five".