20325438 has 64 divisors (see below), whose sum is σ = 54673920. Its totient is φ = 5463936.

The previous prime is 20325401. The next prime is 20325443. The reversal of 20325438 is 83452302.

20325438 is a `hidden beast` number, since 203 + 25 + 438 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4845 + ... + 8007.

It is an arithmetic number, because the mean of its divisors is an integer number (854280).

Almost surely, 2^20325438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20325438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27336960).

20325438 is an abundant number, since it is smaller than the sum of its proper divisors (34348482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20325438 is a wasteful number, since it uses less digits than its factorization.

20325438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198 (or 3192 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20325438 is about 4508.3742080710. The cubic root of 20325438 is about 272.9061384850.

The spelling of 20325438 in words is "twenty million, three hundred twenty-five thousand, four hundred thirty-eight".