20111691343 has 2 divisors, whose sum is σ = 20111691344. Its totient is φ = 20111691342.

The previous prime is 20111691287. The next prime is 20111691401. The reversal of 20111691343 is 34319611102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111691343 - 2²⁹ = 19574820431 is a prime.

It is a super-2 number, since 2×20111691343² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111611343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055845671 + 10055845672.

It is an arithmetic number, because the mean of its divisors is an integer number (10055845672).

Almost surely, 2^20111691343 is an apocalyptic number.

20111691343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111691343 is an equidigital number, since it uses as much as digits as its factorization.

20111691343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20111691343 in words is "twenty billion, one hundred eleven million, six hundred ninety-one thousand, three hundred forty-three".