20011153 has 2 divisors, whose sum is σ = 20011154. Its totient is φ = 20011152.

The previous prime is 20011139. The next prime is 20011163. The reversal of 20011153 is 35111002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 501264 = 4417^2 + 708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011153 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005576 + 10005577.

It is an arithmetic number, because the mean of its divisors is an integer number (10005577).

Almost surely, 2^20011153 is an apocalyptic number.

It is an amenable number.

20011153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011153 is an equidigital number, since it uses as much as digits as its factorization.

20011153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 20011153 is about 4473.3827245162. The cubic root of 20011153 is about 271.4922087828.

Adding to 20011153 its reverse (35111002), we get a palindrome (55122155).

It can be divided in two parts, 20011 and 153, that added together give a square (20164 = 142²).

The spelling of 20011153 in words is "twenty million, eleven thousand, one hundred fifty-three".