20382408 has 64 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 6745536.

The previous prime is 20382391. The next prime is 20382419. The reversal of 20382408 is 80428302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42313 + ... + 42791.

It is an arithmetic number, because the mean of its divisors is an integer number (891000).

Almost surely, 2^20382408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20382408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28512000).

20382408 is an abundant number, since it is smaller than the sum of its proper divisors (36641592).

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

20382408 is a wasteful number, since it uses less digits than its factorization.

20382408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20382408 is about 4514.6880290891. The cubic root of 20382408 is about 273.1608760760.

The spelling of 20382408 in words is "twenty million, three hundred eighty-two thousand, four hundred eight".