20540375 has 16 divisors (see below), whose sum is σ = 25997088. Its totient is φ = 16200000.

The previous prime is 20540353. The next prime is 20540393. The reversal of 20540375 is 57304502.

It is not a de Polignac number, because 20540375 - 2¹² = 20536279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8000 + ... + 10250.

It is an arithmetic number, because the mean of its divisors is an integer number (1624818).

Almost surely, 2^20540375 is an apocalyptic number.

20540375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20540375 is a deficient number, since it is larger than the sum of its proper divisors (5456713).

20540375 is an equidigital number, since it uses as much as digits as its factorization.

20540375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339 (or 2329 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20540375 is about 4532.1490487406. The cubic root of 20540375 is about 273.8647413468.

Adding to 20540375 its reverse (57304502), we get a palindrome (77844877).

The spelling of 20540375 in words is "twenty million, five hundred forty thousand, three hundred seventy-five".