20325421 has 8 divisors (see below), whose sum is σ = 22654080. Its totient is φ = 18122688.

The previous prime is 20325401. The next prime is 20325443. The reversal of 20325421 is 12452302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20325421 - 2¹³ = 20317229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20325401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31141 + ... + 31786.

It is an arithmetic number, because the mean of its divisors is an integer number (2831760).

Almost surely, 2^20325421 is an apocalyptic number.

It is an amenable number.

20325421 is a deficient number, since it is larger than the sum of its proper divisors (2328659).

20325421 is a wasteful number, since it uses less digits than its factorization.

20325421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62963.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20325421 is about 4508.3723226903. The cubic root of 20325421 is about 272.9060623996.

Adding to 20325421 its reverse (12452302), we get a palindrome (32777723).

The spelling of 20325421 in words is "twenty million, three hundred twenty-five thousand, four hundred twenty-one".