20111552 has 14 divisors (see below), whose sum is σ = 39908988. Its totient is φ = 10055744.

The previous prime is 20111501. The next prime is 20111563. The reversal of 20111552 is 25511102.

It is a self number, because there is not a number n which added to its sum of digits gives 20111552.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157058 + ... + 157185.

It is an arithmetic number, because the mean of its divisors is an integer number (2850642).

Almost surely, 2^20111552 is an apocalyptic number.

It is an amenable number.

20111552 is a deficient number, since it is larger than the sum of its proper divisors (19797436).

20111552 is an equidigital number, since it uses as much as digits as its factorization.

20111552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314255 (or 314245 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 20111552 is about 4484.5905052747. The cubic root of 20111552 is about 271.9454908071.

Adding to 20111552 its reverse (25511102), we get a palindrome (45622654).

The spelling of 20111552 in words is "twenty million, one hundred eleven thousand, five hundred fifty-two".