19957137 has 8 divisors (see below), whose sum is σ = 26854080. Its totient is φ = 13182480.

The previous prime is 19957129. The next prime is 19957139. The reversal of 19957137 is 73175991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19957137 - 2³ = 19957129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19957139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30189 + ... + 30842.

It is an arithmetic number, because the mean of its divisors is an integer number (3356760).

Almost surely, 2^19957137 is an apocalyptic number.

It is an amenable number.

19957137 is a deficient number, since it is larger than the sum of its proper divisors (6896943).

19957137 is a wasteful number, since it uses less digits than its factorization.

19957137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61143.

The product of its digits is 59535, while the sum is 42.

The square root of 19957137 is about 4467.3411555421. The cubic root of 19957137 is about 271.2477094953.

The spelling of 19957137 in words is "nineteen million, nine hundred fifty-seven thousand, one hundred thirty-seven".