20540532 has 24 divisors (see below), whose sum is σ = 48044416. Its totient is φ = 6830208.

The previous prime is 20540519. The next prime is 20540537. The reversal of 20540532 is 23504502.

It is a junction number, because it is equal to n+sod(n) for n = 20540499 and 20540508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540537) 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 7 ways as a sum of consecutive naturals, for example, 3708 + ... + 7404.

Almost surely, 2^20540532 is an apocalyptic number.

It is an amenable number.

20540532 is an abundant number, since it is smaller than the sum of its proper divisors (27503884).

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

20540532 is a wasteful number, since it uses less digits than its factorization.

20540532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167 (or 4165 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20540532 is about 4532.1663694088. The cubic root of 20540532 is about 273.8654391052.

The spelling of 20540532 in words is "twenty million, five hundred forty thousand, five hundred thirty-two".