20540548 has 12 divisors (see below), whose sum is σ = 41081152. Its totient is φ = 8803080.

The previous prime is 20540543. The next prime is 20540557. The reversal of 20540548 is 84504502.

20540548 is an admirable number.

It is a super-2 number, since 2×20540548² = 843828224280608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 733591 = 20540548 / (2 + 0 + 5 + 4 + 0 + 5 + 4 + 8).

It is not an unprimeable number, because it can be changed into a prime (20540543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366768 + ... + 366823.

Almost surely, 2^20540548 is an apocalyptic number.

20540548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20540548 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20540548 is a wasteful number, since it uses less digits than its factorization.

20540548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733602 (or 733600 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 20540548 is about 4532.1681345687. The cubic root of 20540548 is about 273.8655102141.

The spelling of 20540548 in words is "twenty million, five hundred forty thousand, five hundred forty-eight".