20854378 has 4 divisors (see below), whose sum is σ = 31281570. Its totient is φ = 10427188.

The previous prime is 20854369. The next prime is 20854397. The reversal of 20854378 is 87345802.

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., 15108769 + 5745609 = 3887^2 + 2397^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5213593 + ... + 5213596.

Almost surely, 2^20854378 is an apocalyptic number.

20854378 is a deficient number, since it is larger than the sum of its proper divisors (10427192).

20854378 is a wasteful number, since it uses less digits than its factorization.

20854378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427191.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20854378 is about 4566.6593917217. The cubic root of 20854378 is about 275.2532235063.

The spelling of 20854378 in words is "twenty million, eight hundred fifty-four thousand, three hundred seventy-eight".