19473920 has 40 divisors (see below), whose sum is σ = 46697904. Its totient is φ = 7788544.

The previous prime is 19473919. The next prime is 19473929. The reversal of 19473920 is 2937491.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19473929) 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 3 ways as a sum of consecutive naturals, for example, 1244 + ... + 6363.

Almost surely, 2^19473920 is an apocalyptic number.

19473920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19473920 is an abundant number, since it is smaller than the sum of its proper divisors (27223984).

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

19473920 is an frugal number, since it uses more digits than its factorization.

19473920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630 (or 7614 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 19473920 is about 4412.9264666432. The cubic root of 19473920 is about 269.0405820395.

The spelling of 19473920 in words is "nineteen million, four hundred seventy-three thousand, nine hundred twenty".