19113957 has 6 divisors (see below), whose sum is σ = 27609062. Its totient is φ = 12742632.

The previous prime is 19113937. The next prime is 19113959. The reversal of 19113957 is 75931191.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 4322241 = 3846^2 + 2079^2 .

It is not a de Polignac number, because 19113957 - 2⁶ = 19113893 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 (19113959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1061878 + ... + 1061895.

Almost surely, 2^19113957 is an apocalyptic number.

It is an amenable number.

19113957 is a deficient number, since it is larger than the sum of its proper divisors (8495105).

19113957 is a wasteful number, since it uses less digits than its factorization.

19113957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123779 (or 2123776 counting only the distinct ones).

The product of its digits is 8505, while the sum is 36.

The square root of 19113957 is about 4371.9511662415. The cubic root of 19113957 is about 267.3725808856.

The spelling of 19113957 in words is "nineteen million, one hundred thirteen thousand, nine hundred fifty-seven".