20101953719 has 2 divisors, whose sum is σ = 20101953720. Its totient is φ = 20101953718.

The previous prime is 20101953713. The next prime is 20101953733. The reversal of 20101953719 is 91735910102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101953719 is a prime.

It is a super-2 number, since 2×20101953719² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101953713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050976859 + 10050976860.

It is an arithmetic number, because the mean of its divisors is an integer number (10050976860).

Almost surely, 2^20101953719 is an apocalyptic number.

20101953719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101953719 is an equidigital number, since it uses as much as digits as its factorization.

20101953719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 38.

The spelling of 20101953719 in words is "twenty billion, one hundred one million, nine hundred fifty-three thousand, seven hundred nineteen".