20387153 has 8 divisors (see below), whose sum is σ = 20886336. Its totient is φ = 19894000.

The previous prime is 20387123. The next prime is 20387167. The reversal of 20387153 is 35178302.

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 20387153 - 2⁶ = 20387089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20387113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5750 + ... + 8592.

It is an arithmetic number, because the mean of its divisors is an integer number (2610792).

Almost surely, 2^20387153 is an apocalyptic number.

It is an amenable number.

20387153 is a deficient number, since it is larger than the sum of its proper divisors (499183).

20387153 is a wasteful number, since it uses less digits than its factorization.

20387153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20387153 is about 4515.2135054724. The cubic root of 20387153 is about 273.1820716055.

The spelling of 20387153 in words is "twenty million, three hundred eighty-seven thousand, one hundred fifty-three".