20330478 has 48 divisors (see below), whose sum is σ = 50600160. Its totient is φ = 5779008.

The previous prime is 20330477. The next prime is 20330491. The reversal of 20330478 is 87403302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39688 + ... + 40196.

It is an arithmetic number, because the mean of its divisors is an integer number (1054170).

Almost surely, 2^20330478 is an apocalyptic number.

20330478 is an abundant number, since it is smaller than the sum of its proper divisors (30269682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20330478 is a wasteful number, since it uses less digits than its factorization.

20330478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20330478 is about 4508.9331332367. The cubic root of 20330478 is about 272.9286936901.

The spelling of 20330478 in words is "twenty million, three hundred thirty thousand, four hundred seventy-eight".