36721442 has 4 divisors (see below), whose sum is σ = 55082166. Its totient is φ = 18360720.

The previous prime is 36721439. The next prime is 36721483. The reversal of 36721442 is 24412763.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24412763 = 193 ⋅126491.

It can be written as a sum of positive squares in only one way, i.e., 32137561 + 4583881 = 5669^2 + 2141^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9180359 + ... + 9180362.

Almost surely, 2^36721442 is an apocalyptic number.

36721442 is a deficient number, since it is larger than the sum of its proper divisors (18360724).

36721442 is a wasteful number, since it uses less digits than its factorization.

36721442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18360723.

The product of its digits is 8064, while the sum is 29.

The square root of 36721442 is about 6059.8219445789. The cubic root of 36721442 is about 332.3838462128.

The spelling of 36721442 in words is "thirty-six million, seven hundred twenty-one thousand, four hundred forty-two".