20540316 has 48 divisors (see below), whose sum is σ = 49674240. Its totient is φ = 6601920.

The previous prime is 20540293. The next prime is 20540329. The reversal of 20540316 is 61304502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20540292 and 20540301.

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, 44326 + ... + 44786.

It is an arithmetic number, because the mean of its divisors is an integer number (1034880).

Almost surely, 2^20540316 is an apocalyptic number.

It is an amenable number.

20540316 is an abundant number, since it is smaller than the sum of its proper divisors (29133924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20540316 is a wasteful number, since it uses less digits than its factorization.

20540316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20540316 is about 4532.1425396825. The cubic root of 20540316 is about 273.8644791310.

Adding to 20540316 its reverse (61304502), we get a palindrome (81844818).

The spelling of 20540316 in words is "twenty million, five hundred forty thousand, three hundred sixteen".