20378330 has 32 divisors (see below), whose sum is σ = 42405120. Its totient is φ = 6906240.

The previous prime is 20378327. The next prime is 20378333. The reversal of 20378330 is 3387302.

It is an interprime number because it is at equal distance from previous prime (20378327) and next prime (20378333).

It is a self number, because there is not a number n which added to its sum of digits gives 20378330.

It is not an unprimeable number, because it can be changed into a prime (20378333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4595 + ... + 7865.

It is an arithmetic number, because the mean of its divisors is an integer number (1325160).

Almost surely, 2^20378330 is an apocalyptic number.

20378330 is an abundant number, since it is smaller than the sum of its proper divisors (22026790).

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

20378330 is a wasteful number, since it uses less digits than its factorization.

20378330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20378330 is about 4514.2363695314. The cubic root of 20378330 is about 273.1426573527.

The spelling of 20378330 in words is "twenty million, three hundred seventy-eight thousand, three hundred thirty".