20389048 has 8 divisors (see below), whose sum is σ = 38229480. Its totient is φ = 10194520.

The previous prime is 20389027. The next prime is 20389049. The reversal of 20389048 is 84098302.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20389049) 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 as a sum of consecutive naturals, namely, 1274308 + ... + 1274323.

It is an arithmetic number, because the mean of its divisors is an integer number (4778685).

Almost surely, 2^20389048 is an apocalyptic number.

It is an amenable number.

20389048 is a deficient number, since it is larger than the sum of its proper divisors (17840432).

20389048 is a wasteful number, since it uses less digits than its factorization.

20389048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548637 (or 2548633 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20389048 is about 4515.4233467085. The cubic root of 20389048 is about 273.1905354975.

The spelling of 20389048 in words is "twenty million, three hundred eighty-nine thousand, forty-eight".