20209153 has 2 divisors, whose sum is σ = 20209154. Its totient is φ = 20209152.

The previous prime is 20209139. The next prime is 20209169. The reversal of 20209153 is 35190202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13593969 + 6615184 = 3687^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 20209153 - 2⁵ = 20209121 is a prime.

It is not a weakly prime, because it can be changed into another prime (20209253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10104576 + 10104577.

It is an arithmetic number, because the mean of its divisors is an integer number (10104577).

Almost surely, 2^20209153 is an apocalyptic number.

It is an amenable number.

20209153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20209153 is an equidigital number, since it uses as much as digits as its factorization.

20209153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20209153 is about 4495.4591534125. The cubic root of 20209153 is about 272.3846966102.

Adding to 20209153 its reverse (35190202), we get a palindrome (55399355).

The spelling of 20209153 in words is "twenty million, two hundred nine thousand, one hundred fifty-three".