100000019997953 has 2 divisors, whose sum is σ = 100000019997954. Its totient is φ = 100000019997952.

The previous prime is 100000019997859. The next prime is 100000019998007. The reversal of 100000019997953 is 359799910000001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98664647928064 + 1335372069889 = 9933008^2 + 1155583^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000019997953 - 2¹² = 100000019993857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100000019997895 and 100000019997904.

It is not a weakly prime, because it can be changed into another prime (100000019996953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000009998976 + 50000009998977.

It is an arithmetic number, because the mean of its divisors is an integer number (50000009998977).

Almost surely, 2^{100000019997953} is an apocalyptic number.

It is an amenable number.

100000019997953 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000019997953 is an equidigital number, since it uses as much as digits as its factorization.

100000019997953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 688905, while the sum is 53.

Adding to 100000019997953 its reverse (359799910000001), we get a palindrome (459799929997954).

The spelling of 100000019997953 in words is "one hundred trillion, nineteen million, nine hundred ninety-seven thousand, nine hundred fifty-three".