19495972 has 6 divisors (see below), whose sum is σ = 34117958. Its totient is φ = 9747984.

The previous prime is 19495969. The next prime is 19495981. The reversal of 19495972 is 27959491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17842176 + 1653796 = 4224^2 + 1286^2 .

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 as a sum of consecutive naturals, namely, 2436993 + ... + 2437000.

Almost surely, 2^19495972 is an apocalyptic number.

It is an amenable number.

19495972 is a deficient number, since it is larger than the sum of its proper divisors (14621986).

19495972 is a wasteful number, since it uses less digits than its factorization.

19495972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873997 (or 4873995 counting only the distinct ones).

The product of its digits is 204120, while the sum is 46.

The square root of 19495972 is about 4415.4243284196. The cubic root of 19495972 is about 269.1420963534.

It can be divided in two parts, 1949 and 5972, that added together give a square (7921 = 89²).

The spelling of 19495972 in words is "nineteen million, four hundred ninety-five thousand, nine hundred seventy-two".