20113524 has 36 divisors (see below), whose sum is σ = 51051364. Its totient is φ = 6676992.

The previous prime is 20113507. The next prime is 20113537. The reversal of 20113524 is 42531102.

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 9809424 = 3210^2 + 3132^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20113497 and 20113506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8964 + ... + 10980.

Almost surely, 2^20113524 is an apocalyptic number.

It is an amenable number.

20113524 is an abundant number, since it is smaller than the sum of its proper divisors (30937840).

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

20113524 is a wasteful number, since it uses less digits than its factorization.

20113524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20113524 is about 4484.8103638839. The cubic root of 20113524 is about 271.9543788827.

Adding to 20113524 its reverse (42531102), we get a palindrome (62644626).

It can be divided in two parts, 2011352 and 4, that multiplied together give a palindrome (8045408).

The spelling of 20113524 in words is "twenty million, one hundred thirteen thousand, five hundred twenty-four".