19970106641 has 2 divisors, whose sum is σ = 19970106642. Its totient is φ = 19970106640.

The previous prime is 19970106623. The next prime is 19970106679. The reversal of 19970106641 is 14660107991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11129406016 + 8840700625 = 105496^2 + 94025^2 .

It is a cyclic number.

It is not a de Polignac number, because 19970106641 - 2¹⁸ = 19969844497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19970106592 and 19970106601.

It is not a weakly prime, because it can be changed into another prime (19970106041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9985053320 + 9985053321.

It is an arithmetic number, because the mean of its divisors is an integer number (9985053321).

Almost surely, 2^19970106641 is an apocalyptic number.

It is an amenable number.

19970106641 is a deficient number, since it is larger than the sum of its proper divisors (1).

19970106641 is an equidigital number, since it uses as much as digits as its factorization.

19970106641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 19970106641 in words is "nineteen billion, nine hundred seventy million, one hundred six thousand, six hundred forty-one".