210018953 has 2 divisors, whose sum is σ = 210018954. Its totient is φ = 210018952.

The previous prime is 210018943. The next prime is 210018961. The reversal of 210018953 is 359810012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132526144 + 77492809 = 11512^2 + 8803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210018953 is a prime.

It is not a weakly prime, because it can be changed into another prime (210018943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105009476 + 105009477.

It is an arithmetic number, because the mean of its divisors is an integer number (105009477).

Almost surely, 2^210018953 is an apocalyptic number.

It is an amenable number.

210018953 is a deficient number, since it is larger than the sum of its proper divisors (1).

210018953 is an equidigital number, since it uses as much as digits as its factorization.

210018953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 210018953 is about 14492.0306720625. The cubic root of 210018953 is about 594.4100765087.

Adding to 210018953 its reverse (359810012), we get a palindrome (569828965).

The spelling of 210018953 in words is "two hundred ten million, eighteen thousand, nine hundred fifty-three".