19939113 has 30 divisors (see below), whose sum is σ = 32189274. Its totient is φ = 11852352.

The previous prime is 19939111. The next prime is 19939121. The reversal of 19939113 is 31193991.

It can be written as a sum of positive squares in only one way, i.e., 18766224 + 1172889 = 4332^2 + 1083^2 .

It is not a de Polignac number, because 19939113 - 2¹ = 19939111 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19939111) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1049418 + ... + 1049436.

Almost surely, 2^19939113 is an apocalyptic number.

It is an amenable number.

19939113 is a deficient number, since it is larger than the sum of its proper divisors (12250161).

19939113 is an frugal number, since it uses more digits than its factorization.

19939113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 39 counting only the distinct ones).

The product of its digits is 6561, while the sum is 36.

The square root of 19939113 is about 4465.3233925439. The cubic root of 19939113 is about 271.1660270833.

The spelling of 19939113 in words is "nineteen million, nine hundred thirty-nine thousand, one hundred thirteen".