20393378 has 4 divisors (see below), whose sum is σ = 30590070. Its totient is φ = 10196688.

The previous prime is 20393363. The next prime is 20393383. The reversal of 20393378 is 87339302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 528529 = 4457^2 + 727^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5098343 + ... + 5098346.

Almost surely, 2^20393378 is an apocalyptic number.

20393378 is a deficient number, since it is larger than the sum of its proper divisors (10196692).

20393378 is a wasteful number, since it uses less digits than its factorization.

20393378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196691.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20393378 is about 4515.9027890334. The cubic root of 20393378 is about 273.2098731879.

The spelling of 20393378 in words is "twenty million, three hundred ninety-three thousand, three hundred seventy-eight".