20487375 has 24 divisors (see below), whose sum is σ = 36933936. Its totient is φ = 10926000.

The previous prime is 20487371. The next prime is 20487403. The reversal of 20487375 is 57378402.

20487375 is a `hidden beast` number, since 204 + 87 + 375 = 666.

It is not a de Polignac number, because 20487375 - 2² = 20487371 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7981 + ... + 10230.

It is an arithmetic number, because the mean of its divisors is an integer number (1538914).

Almost surely, 2^20487375 is an apocalyptic number.

20487375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20487375 is a deficient number, since it is larger than the sum of its proper divisors (16446561).

20487375 is a wasteful number, since it uses less digits than its factorization.

20487375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18232 (or 18219 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 20487375 is about 4526.2981563304. The cubic root of 20487375 is about 273.6289888618.

The spelling of 20487375 in words is "twenty million, four hundred eighty-seven thousand, three hundred seventy-five".