20113572 has 24 divisors (see below), whose sum is σ = 47728800. Its totient is φ = 6590656.

The previous prime is 20113547. The next prime is 20113573. The reversal of 20113572 is 27531102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13497 + ... + 14912.

It is an arithmetic number, because the mean of its divisors is an integer number (1988700).

Almost surely, 2^20113572 is an apocalyptic number.

It is an amenable number.

20113572 is an abundant number, since it is smaller than the sum of its proper divisors (27615228).

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

20113572 is a wasteful number, since it uses less digits than its factorization.

20113572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28475 (or 28473 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20113572 is about 4484.8157152775. The cubic root of 20113572 is about 271.9545952180.

Adding to 20113572 its reverse (27531102), we get a palindrome (47644674).

The spelling of 20113572 in words is "twenty million, one hundred thirteen thousand, five hundred seventy-two".