20540760 has 64 divisors (see below), whose sum is σ = 65253600. Its totient is φ = 5154816.

The previous prime is 20540747. The next prime is 20540761. The reversal of 20540760 is 6704502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20540760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2995 + ... + 7074.

Almost surely, 2^20540760 is an apocalyptic number.

20540760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20540760 is an abundant number, since it is smaller than the sum of its proper divisors (44712840).

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

20540760 is a wasteful number, since it uses less digits than its factorization.

20540760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100 (or 10096 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20540760 is about 4532.1915228728. The cubic root of 20540760 is about 273.8664524040.

The spelling of 20540760 in words is "twenty million, five hundred forty thousand, seven hundred sixty".