19979464 has 16 divisors (see below), whose sum is σ = 38375820. Its totient is φ = 9745920.

The previous prime is 19979459. The next prime is 19979473. The reversal of 19979464 is 46497991.

It can be written as a sum of positive squares in 2 ways, for example, as 12460900 + 7518564 = 3530^2 + 2742^2 .

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 3 ways as a sum of consecutive naturals, for example, 30129 + ... + 30784.

Almost surely, 2^19979464 is an apocalyptic number.

It is an amenable number.

19979464 is a deficient number, since it is larger than the sum of its proper divisors (18396356).

19979464 is a wasteful number, since it uses less digits than its factorization.

19979464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60960 (or 60956 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 19979464 is about 4469.8393707157. The cubic root of 19979464 is about 271.3488243759.

The spelling of 19979464 in words is "nineteen million, nine hundred seventy-nine thousand, four hundred sixty-four".