20397378 has 8 divisors (see below), whose sum is σ = 40794768. Its totient is φ = 6799124.

The previous prime is 20397373. The next prime is 20397379. The reversal of 20397378 is 87379302.

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

20397378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20397371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699776 + ... + 1699787.

It is an arithmetic number, because the mean of its divisors is an integer number (5099346).

Almost surely, 2^20397378 is an apocalyptic number.

20397378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20397378 is a wasteful number, since it uses less digits than its factorization.

20397378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399568.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 20397378 is about 4516.3456466484. The cubic root of 20397378 is about 273.2277346730.

The spelling of 20397378 in words is "twenty million, three hundred ninety-seven thousand, three hundred seventy-eight".