19231923 has 16 divisors (see below), whose sum is σ = 26224416. Its totient is φ = 12533760.

The previous prime is 19231907. The next prime is 19231943. The reversal of 19231923 is 32913291.

It is a happy number.

It is not a de Polignac number, because 19231923 - 2⁴ = 19231907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19231903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29683 + ... + 30323.

It is an arithmetic number, because the mean of its divisors is an integer number (1639026).

Almost surely, 2^19231923 is an apocalyptic number.

19231923 is a deficient number, since it is larger than the sum of its proper divisors (6992493).

19231923 is a wasteful number, since it uses less digits than its factorization.

19231923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854.

The product of its digits is 2916, while the sum is 30.

The square root of 19231923 is about 4385.4216444944. The cubic root of 19231923 is about 267.9215027771.

It can be divided in two parts, 192 and 31923, that multiplied together give a palindrome (6129216).

The spelling of 19231923 in words is "nineteen million, two hundred thirty-one thousand, nine hundred twenty-three".