20540572 has 24 divisors (see below), whose sum is σ = 39104352. Its totient is φ = 9384000.

The previous prime is 20540561. The next prime is 20540579. The reversal of 20540572 is 27504502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540579) 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, 3297 + ... + 7207.

It is an arithmetic number, because the mean of its divisors is an integer number (1629348).

Almost surely, 2^20540572 is an apocalyptic number.

It is an amenable number.

20540572 is a deficient number, since it is larger than the sum of its proper divisors (18563780).

20540572 is a wasteful number, since it uses less digits than its factorization.

20540572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20540572 is about 4532.1707823073. The cubic root of 20540572 is about 273.8656168774.

It can be divided in two parts, 20540 and 572, that added together give a palindrome (21112).

The spelling of 20540572 in words is "twenty million, five hundred forty thousand, five hundred seventy-two".