19901018153 has 2 divisors, whose sum is σ = 19901018154. Its totient is φ = 19901018152.

The previous prime is 19901018119. The next prime is 19901018161. The reversal of 19901018153 is 35181010991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15374016064 + 4527002089 = 123992^2 + 67283^2 .

It is a cyclic number.

It is not a de Polignac number, because 19901018153 - 2⁸ = 19901017897 is a prime.

It is not a weakly prime, because it can be changed into another prime (19901018113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9950509076 + 9950509077.

It is an arithmetic number, because the mean of its divisors is an integer number (9950509077).

Almost surely, 2^19901018153 is an apocalyptic number.

It is an amenable number.

19901018153 is a deficient number, since it is larger than the sum of its proper divisors (1).

19901018153 is an equidigital number, since it uses as much as digits as its factorization.

19901018153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 38.

The spelling of 19901018153 in words is "nineteen billion, nine hundred one million, eighteen thousand, one hundred fifty-three".