20541315 has 16 divisors (see below), whose sum is σ = 33631488. Its totient is φ = 10700256.

The previous prime is 20541307. The next prime is 20541317. The reversal of 20541315 is 51314502.

It is not a de Polignac number, because 20541315 - 2³ = 20541307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20541291 and 20541300.

It is not an unprimeable number, because it can be changed into a prime (20541317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15279 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (2101968).

Almost surely, 2^20541315 is an apocalyptic number.

20541315 is a deficient number, since it is larger than the sum of its proper divisors (13090173).

20541315 is a wasteful number, since it uses less digits than its factorization.

20541315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31898.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20541315 is about 4532.2527511162. The cubic root of 20541315 is about 273.8689189552.

Adding to 20541315 its reverse (51314502), we get a palindrome (71855817).

The spelling of 20541315 in words is "twenty million, five hundred forty-one thousand, three hundred fifteen".