20389152 has 48 divisors (see below), whose sum is σ = 61169472. Its totient is φ = 5825280.

The previous prime is 20389151. The next prime is 20389157. The reversal of 20389152 is 25198302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20389151) 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, 14499 + ... + 15842.

It is an arithmetic number, because the mean of its divisors is an integer number (1274364).

Almost surely, 2^20389152 is an apocalyptic number.

It is an amenable number.

20389152 is an abundant number, since it is smaller than the sum of its proper divisors (40780320).

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

20389152 is a wasteful number, since it uses less digits than its factorization.

20389152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30361 (or 30353 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20389152 is about 4515.4348627790. The cubic root of 20389152 is about 273.1909999915.

The spelling of 20389152 in words is "twenty million, three hundred eighty-nine thousand, one hundred fifty-two".