20961194 has 8 divisors (see below), whose sum is σ = 31601988. Its totient is φ = 10427200.

The previous prime is 20961181. The next prime is 20961251. The reversal of 20961194 is 49116902.

It can be written as a sum of positive squares in 2 ways, for example, as 16605625 + 4355569 = 4075^2 + 2087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20961194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26207 + ... + 26994.

Almost surely, 2^20961194 is an apocalyptic number.

20961194 is a deficient number, since it is larger than the sum of its proper divisors (10640794).

20961194 is a wasteful number, since it uses less digits than its factorization.

20961194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53400.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 20961194 is about 4578.3396553773. The cubic root of 20961194 is about 275.7223718815.

The spelling of 20961194 in words is "twenty million, nine hundred sixty-one thousand, one hundred ninety-four".