18961744 has 10 divisors (see below), whose sum is σ = 36738410. Its totient is φ = 9480864.

The previous prime is 18961711. The next prime is 18961751. The reversal of 18961744 is 44716981.

It can be written as a sum of positive squares in only one way, i.e., 16711744 + 2250000 = 4088^2 + 1500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18961697 and 18961706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592539 + ... + 592570.

It is an arithmetic number, because the mean of its divisors is an integer number (3673841).

Almost surely, 2^18961744 is an apocalyptic number.

It is an amenable number.

18961744 is a deficient number, since it is larger than the sum of its proper divisors (17776666).

18961744 is a wasteful number, since it uses less digits than its factorization.

18961744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185117 (or 1185111 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 18961744 is about 4354.5084682430. The cubic root of 18961744 is about 266.6609526553.

The spelling of 18961744 in words is "eighteen million, nine hundred sixty-one thousand, seven hundred forty-four".