20520541724 has 24 divisors (see below), whose sum is σ = 36028758528. Its totient is φ = 10226664560.

The previous prime is 20520541721. The next prime is 20520541733. The reversal of 20520541724 is 42714502502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520541721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1688879 + ... + 1700985.

It is an arithmetic number, because the mean of its divisors is an integer number (1501198272).

Almost surely, 2^20520541724 is an apocalyptic number.

It is an amenable number.

20520541724 is a deficient number, since it is larger than the sum of its proper divisors (15508216804).

20520541724 is a wasteful number, since it uses less digits than its factorization.

20520541724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13465 (or 13463 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 32.

The spelling of 20520541724 in words is "twenty billion, five hundred twenty million, five hundred forty-one thousand, seven hundred twenty-four".