20744378 has 8 divisors (see below), whose sum is σ = 31157460. Its totient is φ = 10358560.

The previous prime is 20744377. The next prime is 20744389. The reversal of 20744378 is 87344702.

It can be written as a sum of positive squares in 2 ways, for example, as 20675209 + 69169 = 4547^2 + 263^2 .

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 (20744377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4793 + ... + 8028.

Almost surely, 2^20744378 is an apocalyptic number.

20744378 is a deficient number, since it is larger than the sum of its proper divisors (10413082).

20744378 is a wasteful number, since it uses less digits than its factorization.

20744378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13632.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 20744378 is about 4554.5996530980. The cubic root of 20744378 is about 274.7684132923.

The spelling of 20744378 in words is "twenty million, seven hundred forty-four thousand, three hundred seventy-eight".