19767972 has 36 divisors (see below), whose sum is σ = 53657520. Its totient is φ = 5647824.

The previous prime is 19767959. The next prime is 19767973. The reversal of 19767972 is 27976791.

It is not an unprimeable number, because it can be changed into a prime (19767973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16222 + ... + 17397.

Almost surely, 2^19767972 is an apocalyptic number.

19767972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19767972 is an abundant number, since it is smaller than the sum of its proper divisors (33889548).

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

19767972 is a wasteful number, since it uses less digits than its factorization.

19767972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33640 (or 33631 counting only the distinct ones).

The product of its digits is 333396, while the sum is 48.

The square root of 19767972 is about 4446.1187568485. The cubic root of 19767972 is about 270.3879744719.

The spelling of 19767972 in words is "nineteen million, seven hundred sixty-seven thousand, nine hundred seventy-two".