20378808 has 48 divisors (see below), whose sum is σ = 55419000. Its totient is φ = 6765120.

The previous prime is 20378807. The next prime is 20378821. The reversal of 20378808 is 80887302.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20378803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24723 + ... + 25533.

Almost surely, 2^20378808 is an apocalyptic number.

It is an amenable number.

20378808 is an abundant number, since it is smaller than the sum of its proper divisors (35040192).

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

20378808 is a wasteful number, since it uses less digits than its factorization.

20378808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 20378808 is about 4514.2893128376. The cubic root of 20378808 is about 273.1447929738.

The spelling of 20378808 in words is "twenty million, three hundred seventy-eight thousand, eight hundred eight".