20469408 has 24 divisors (see below), whose sum is σ = 53732448. Its totient is φ = 6823104.

The previous prime is 20469391. The next prime is 20469413. The reversal of 20469408 is 80496402.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106516 + ... + 106707.

It is an arithmetic number, because the mean of its divisors is an integer number (2238852).

Almost surely, 2^20469408 is an apocalyptic number.

It is an amenable number.

20469408 is an abundant number, since it is smaller than the sum of its proper divisors (33263040).

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

20469408 is a wasteful number, since it uses less digits than its factorization.

20469408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213236 (or 213228 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20469408 is about 4524.3129865207. The cubic root of 20469408 is about 273.5489764980.

The spelling of 20469408 in words is "twenty million, four hundred sixty-nine thousand, four hundred eight".