19973269920 has 96 divisors (see below), whose sum is σ = 65651306112. Its totient is φ = 5094628352.

The previous prime is 19973269919. The next prime is 19973269937. The reversal of 19973269920 is 2996237991.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×19973269920² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 893547 + ... + 915626.

It is an arithmetic number, because the mean of its divisors is an integer number (683867772).

Almost surely, 2^19973269920 is an apocalyptic number.

19973269920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19973269920 is an abundant number, since it is smaller than the sum of its proper divisors (45678036192).

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

19973269920 is a wasteful number, since it uses less digits than its factorization.

19973269920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809214 (or 1809206 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 57.

The spelling of 19973269920 in words is "nineteen billion, nine hundred seventy-three million, two hundred sixty-nine thousand, nine hundred twenty".