19913101 has 24 divisors (see below), whose sum is σ = 23189760. Its totient is φ = 17050176.

The previous prime is 19913099. The next prime is 19913119. The reversal of 19913101 is 10131991.

It is not a de Polignac number, because 19913101 - 2¹ = 19913099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19914101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182635 + ... + 182743.

It is an arithmetic number, because the mean of its divisors is an integer number (966240).

Almost surely, 2^19913101 is an apocalyptic number.

It is an amenable number.

19913101 is a deficient number, since it is larger than the sum of its proper divisors (3276659).

19913101 is a wasteful number, since it uses less digits than its factorization.

19913101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 19913101 is about 4462.4097749983. The cubic root of 19913101 is about 271.0480572717.

The spelling of 19913101 in words is "nineteen million, nine hundred thirteen thousand, one hundred one".