19937964 has 96 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 5893888.

The previous prime is 19937909. The next prime is 19937971. The reversal of 19937964 is 46973991.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 376162 + ... + 376214.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^19937964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19937964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26127360).

19937964 is an abundant number, since it is smaller than the sum of its proper divisors (32316756).

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

19937964 is a wasteful number, since it uses less digits than its factorization.

19937964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 157 counting only the distinct ones).

The product of its digits is 367416, while the sum is 48.

The square root of 19937964 is about 4465.1947325957. The cubic root of 19937964 is about 271.1608182968.

The spelling of 19937964 in words is "nineteen million, nine hundred thirty-seven thousand, nine hundred sixty-four".