20285378 has 8 divisors (see below), whose sum is σ = 30519372. Its totient is φ = 10112256.

The previous prime is 20285359. The next prime is 20285393. The reversal of 20285378 is 87358202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16297369 + 3988009 = 4037^2 + 1997^2 .

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

It is a super-2 number, since 2×20285378² = 822993121205768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14375 + ... + 15722.

Almost surely, 2^20285378 is an apocalyptic number.

20285378 is a deficient number, since it is larger than the sum of its proper divisors (10233994).

20285378 is a wasteful number, since it uses less digits than its factorization.

20285378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30436.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 20285378 is about 4503.9291735106. The cubic root of 20285378 is about 272.7267276689.

The spelling of 20285378 in words is "twenty million, two hundred eighty-five thousand, three hundred seventy-eight".