20452556 has 24 divisors (see below), whose sum is σ = 36736560. Its totient is φ = 9960192.

The previous prime is 20452519. The next prime is 20452559. The reversal of 20452556 is 65525402.

It is not an unprimeable number, because it can be changed into a prime (20452559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25595 + ... + 26381.

It is an arithmetic number, because the mean of its divisors is an integer number (1530690).

Almost surely, 2^20452556 is an apocalyptic number.

It is an amenable number.

20452556 is a deficient number, since it is larger than the sum of its proper divisors (16284004).

20452556 is a wasteful number, since it uses less digits than its factorization.

20452556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 20452556 is about 4522.4502208427. The cubic root of 20452556 is about 273.4738869955.

Adding to 20452556 its reverse (65525402), we get a palindrome (85977958).

The spelling of 20452556 in words is "twenty million, four hundred fifty-two thousand, five hundred fifty-six".