20885408 has 24 divisors (see below), whose sum is σ = 43283520. Its totient is φ = 9892800.

The previous prime is 20885407. The next prime is 20885411. The reversal of 20885408 is 80458802.

It is not an unprimeable number, because it can be changed into a prime (20885407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16568 + ... + 17783.

It is an arithmetic number, because the mean of its divisors is an integer number (1803480).

Almost surely, 2^20885408 is an apocalyptic number.

It is an amenable number.

20885408 is an abundant number, since it is smaller than the sum of its proper divisors (22398112).

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

20885408 is a wasteful number, since it uses less digits than its factorization.

20885408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34380 (or 34372 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 20885408 is about 4570.0555795307. The cubic root of 20885408 is about 275.3896756670.

The spelling of 20885408 in words is "twenty million, eight hundred eighty-five thousand, four hundred eight".