20541572 has 12 divisors (see below), whose sum is σ = 36099840. Its totient is φ = 10227336.

The previous prime is 20541571. The next prime is 20541583. The reversal of 20541572 is 27514502.

It is not an unprimeable number, because it can be changed into a prime (20541571) 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, 9788 + ... + 11699.

It is an arithmetic number, because the mean of its divisors is an integer number (3008320).

Almost surely, 2^20541572 is an apocalyptic number.

It is an amenable number.

20541572 is a deficient number, since it is larger than the sum of its proper divisors (15558268).

20541572 is a wasteful number, since it uses less digits than its factorization.

20541572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21730 (or 21728 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 20541572 is about 4532.2811033739. The cubic root of 20541572 is about 273.8700611090.

The spelling of 20541572 in words is "twenty million, five hundred forty-one thousand, five hundred seventy-two".