20524540 has 12 divisors (see below), whose sum is σ = 43101576. Its totient is φ = 8209808.

The previous prime is 20524531. The next prime is 20524613. The reversal of 20524540 is 4542502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513094 + ... + 513133.

It is an arithmetic number, because the mean of its divisors is an integer number (3591798).

Almost surely, 2^20524540 is an apocalyptic number.

20524540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20524540 is an abundant number, since it is smaller than the sum of its proper divisors (22577036).

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

20524540 is a wasteful number, since it uses less digits than its factorization.

20524540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026236 (or 1026234 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20524540 is about 4530.4017481897. The cubic root of 20524540 is about 273.7943472562.

The spelling of 20524540 in words is "twenty million, five hundred twenty-four thousand, five hundred forty".