19138953 has 8 divisors (see below), whose sum is σ = 26208448. Its totient is φ = 12414384.

The previous prime is 19138949. The next prime is 19138961. The reversal of 19138953 is 35983191.

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

It is not a de Polignac number, because 19138953 - 2² = 19138949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19138943) 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, 86101 + ... + 86322.

It is an arithmetic number, because the mean of its divisors is an integer number (3276056).

Almost surely, 2^19138953 is an apocalyptic number.

It is an amenable number.

19138953 is a deficient number, since it is larger than the sum of its proper divisors (7069495).

19138953 is a wasteful number, since it uses less digits than its factorization.

19138953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172463.

The product of its digits is 29160, while the sum is 39.

The square root of 19138953 is about 4374.8089101125. The cubic root of 19138953 is about 267.4890809879.

The spelling of 19138953 in words is "nineteen million, one hundred thirty-eight thousand, nine hundred fifty-three".