20672378 has 8 divisors (see below), whose sum is σ = 31027860. Its totient is φ = 10329760.

The previous prime is 20672371. The next prime is 20672411. The reversal of 20672378 is 87327602.

It can be written as a sum of positive squares in 2 ways, for example, as 20043529 + 628849 = 4477^2 + 793^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20672371) by changing a digit.

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, 4808 + ... + 8028.

Almost surely, 2^20672378 is an apocalyptic number.

20672378 is a deficient number, since it is larger than the sum of its proper divisors (10355482).

20672378 is a wasteful number, since it uses less digits than its factorization.

20672378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 20672378 is about 4546.6886851862. The cubic root of 20672378 is about 274.4501542422.

The spelling of 20672378 in words is "twenty million, six hundred seventy-two thousand, three hundred seventy-eight".