20325501 has 12 divisors (see below), whose sum is σ = 33553312. Its totient is φ = 11614536.

The previous prime is 20325493. The next prime is 20325511. The reversal of 20325501 is 10552302.

It is a happy number.

It is not a de Polignac number, because 20325501 - 2³ = 20325493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20325511) 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 11 ways as a sum of consecutive naturals, for example, 161251 + ... + 161376.

Almost surely, 2^20325501 is an apocalyptic number.

20325501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20325501 is a deficient number, since it is larger than the sum of its proper divisors (13227811).

20325501 is a wasteful number, since it uses less digits than its factorization.

20325501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322640 (or 322637 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20325501 is about 4508.3811950633. The cubic root of 20325501 is about 272.9064204481.

Adding to 20325501 its reverse (10552302), we get a palindrome (30877803).

The spelling of 20325501 in words is "twenty million, three hundred twenty-five thousand, five hundred one".