20045572 has 12 divisors (see below), whose sum is σ = 35574336. Its totient is φ = 9881480.

The previous prime is 20045563. The next prime is 20045573. The reversal of 20045572 is 27554002.

It is a super-3 number, since 3×20045572³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35008 + ... + 35575.

It is an arithmetic number, because the mean of its divisors is an integer number (2964528).

Almost surely, 2^20045572 is an apocalyptic number.

It is an amenable number.

20045572 is a deficient number, since it is larger than the sum of its proper divisors (15528764).

20045572 is a wasteful number, since it uses less digits than its factorization.

20045572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70658 (or 70656 counting only the distinct ones).

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

The square root of 20045572 is about 4477.2281603689. The cubic root of 20045572 is about 271.6477743312.

Adding to 20045572 its reverse (27554002), we get a palindrome (47599574).

The spelling of 20045572 in words is "twenty million, forty-five thousand, five hundred seventy-two".