20741808 has 20 divisors (see below), whose sum is σ = 53583128. Its totient is φ = 6913920.

The previous prime is 20741803. The next prime is 20741827. The reversal of 20741808 is 80814702.

It is not an unprimeable number, because it can be changed into a prime (20741803) 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, 216013 + ... + 216108.

Almost surely, 2^20741808 is an apocalyptic number.

It is an amenable number.

20741808 is an abundant number, since it is smaller than the sum of its proper divisors (32841320).

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

20741808 is a wasteful number, since it uses less digits than its factorization.

20741808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432132 (or 432126 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20741808 is about 4554.3175119879. The cubic root of 20741808 is about 274.7570658968.

The spelling of 20741808 in words is "twenty million, seven hundred forty-one thousand, eight hundred eight".