20523375 has 40 divisors (see below), whose sum is σ = 38280528. Its totient is φ = 10940400.

The previous prime is 20523361. The next prime is 20523379. The reversal of 20523375 is 57332502.

It is not a de Polignac number, because 20523375 - 2⁵ = 20523343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523379) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9112 + ... + 11138.

Almost surely, 2^20523375 is an apocalyptic number.

20523375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20523375 is a deficient number, since it is larger than the sum of its proper divisors (17757153).

20523375 is an equidigital number, since it uses as much as digits as its factorization.

20523375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2035 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 20523375 is about 4530.2731705715. The cubic root of 20523375 is about 273.7891668485.

Adding to 20523375 its reverse (57332502), we get a palindrome (77855877).

The spelling of 20523375 in words is "twenty million, five hundred twenty-three thousand, three hundred seventy-five".