20387148 has 72 divisors (see below), whose sum is σ = 52475472. Its totient is φ = 6137856.

The previous prime is 20387123. The next prime is 20387167. The reversal of 20387148 is 84178302.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279240 + ... + 279312.

It is an arithmetic number, because the mean of its divisors is an integer number (728826).

Almost surely, 2^20387148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20387148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26237736).

20387148 is an abundant number, since it is smaller than the sum of its proper divisors (32088324).

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

20387148 is a wasteful number, since it uses less digits than its factorization.

20387148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20387148 is about 4515.2129517887. The cubic root of 20387148 is about 273.1820492726.

The spelling of 20387148 in words is "twenty million, three hundred eighty-seven thousand, one hundred forty-eight".