20435408 has 40 divisors (see below), whose sum is σ = 47223168. Its totient is φ = 8376192.

The previous prime is 20435407. The next prime is 20435413. The reversal of 20435408 is 80453402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435407) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1391 + ... + 6542.

Almost surely, 2^20435408 is an apocalyptic number.

20435408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20435408 is an abundant number, since it is smaller than the sum of its proper divisors (26787760).

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

20435408 is a wasteful number, since it uses less digits than its factorization.

20435408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20435408 is about 4520.5539483563. The cubic root of 20435408 is about 273.3974362178.

The spelling of 20435408 in words is "twenty million, four hundred thirty-five thousand, four hundred eight".