19923012 has 18 divisors (see below), whose sum is σ = 50361038. Its totient is φ = 6640992.

The previous prime is 19923011. The next prime is 19923017. The reversal of 19923012 is 21032991.

It can be written as a sum of positive squares in only one way, i.e., 18870336 + 1052676 = 4344^2 + 1026^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (19923011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276673 + ... + 276744.

Almost surely, 2^19923012 is an apocalyptic number.

19923012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19923012 is an abundant number, since it is smaller than the sum of its proper divisors (30438026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19923012 is a wasteful number, since it uses less digits than its factorization.

19923012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553427 (or 553422 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 19923012 is about 4463.5201354984. The cubic root of 19923012 is about 271.0930178187.

The spelling of 19923012 in words is "nineteen million, nine hundred twenty-three thousand, twelve".