20540315 has 4 divisors (see below), whose sum is σ = 24648384. Its totient is φ = 16432248.

The previous prime is 20540293. The next prime is 20540329. The reversal of 20540315 is 51304502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51304502 = 2 ⋅25652251.

It is a cyclic number.

It is not a de Polignac number, because 20540315 - 2⁶ = 20540251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054027 + ... + 2054036.

It is an arithmetic number, because the mean of its divisors is an integer number (6162096).

Almost surely, 2^20540315 is an apocalyptic number.

20540315 is a deficient number, since it is larger than the sum of its proper divisors (4108069).

20540315 is an equidigital number, since it uses as much as digits as its factorization.

20540315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108068.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20540315 is about 4532.1424293594. The cubic root of 20540315 is about 273.8644746866.

Adding to 20540315 its reverse (51304502), we get a palindrome (71844817).

The spelling of 20540315 in words is "twenty million, five hundred forty thousand, three hundred fifteen".