19021992 has 32 divisors (see below), whose sum is σ = 51878880. Its totient is φ = 5764160.

The previous prime is 19021987. The next prime is 19021993. The reversal of 19021992 is 29912091.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (19021993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35763 + ... + 36290.

It is an arithmetic number, because the mean of its divisors is an integer number (1621215).

Almost surely, 2^19021992 is an apocalyptic number.

19021992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19021992 is an abundant number, since it is smaller than the sum of its proper divisors (32856888).

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

19021992 is a wasteful number, since it uses less digits than its factorization.

19021992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72073 (or 72069 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 19021992 is about 4361.4208693957. The cubic root of 19021992 is about 266.9430786653.

The spelling of 19021992 in words is "nineteen million, twenty-one thousand, nine hundred ninety-two".