19946190031 has 2 divisors, whose sum is σ = 19946190032. Its totient is φ = 19946190030.

The previous prime is 19946190023. The next prime is 19946190041. The reversal of 19946190031 is 13009164991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19946190031 - 2³ = 19946190023 is a prime.

It is a super-2 number, since 2×19946190031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19946190031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19946190001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9973095015 + 9973095016.

It is an arithmetic number, because the mean of its divisors is an integer number (9973095016).

Almost surely, 2^19946190031 is an apocalyptic number.

19946190031 is a deficient number, since it is larger than the sum of its proper divisors (1).

19946190031 is an equidigital number, since it uses as much as digits as its factorization.

19946190031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 19946190031 in words is "nineteen billion, nine hundred forty-six million, one hundred ninety thousand, thirty-one".