20018572 has 12 divisors (see below), whose sum is σ = 40037200. Its totient is φ = 8579376.

The previous prime is 20018567. The next prime is 20018587. The reversal of 20018572 is 27581002.

20018572 is an admirable 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, 357447 + ... + 357502.

Almost surely, 2^20018572 is an apocalyptic number.

It is an amenable number.

20018572 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20018572 is a wasteful number, since it uses less digits than its factorization.

20018572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714960 (or 714958 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20018572 is about 4474.2118859080. The cubic root of 20018572 is about 271.5257559391.

Adding to 20018572 its reverse (27581002), we get a palindrome (47599574).

The spelling of 20018572 in words is "twenty million, eighteen thousand, five hundred seventy-two".