20378408 has 16 divisors (see below), whose sum is σ = 39442560. Its totient is φ = 9860400.

The previous prime is 20378399. The next prime is 20378417. The reversal of 20378408 is 80487302.

It is an interprime number because it is at equal distance from previous prime (20378399) and next prime (20378417).

It is a super-2 number, since 2×20378408² = 830559025228928, which contains 22 as substring.

It is an unprimeable number.

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, 40838 + ... + 41333.

It is an arithmetic number, because the mean of its divisors is an integer number (2465160).

Almost surely, 2^20378408 is an apocalyptic number.

It is an amenable number.

20378408 is a deficient number, since it is larger than the sum of its proper divisors (19064152).

20378408 is a wasteful number, since it uses less digits than its factorization.

20378408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82208 (or 82204 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20378408 is about 4514.2450088581. The cubic root of 20378408 is about 273.1430058455.

The spelling of 20378408 in words is "twenty million, three hundred seventy-eight thousand, four hundred eight".