20308842 has 24 divisors (see below), whose sum is σ = 44087940. Its totient is φ = 6756480.

The previous prime is 20308837. The next prime is 20308843. The reversal of 20308842 is 24880302.

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 408321 = 4461^2 + 639^2 .

It is not an unprimeable number, because it can be changed into a prime (20308843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14242 + ... + 15602.

Almost surely, 2^20308842 is an apocalyptic number.

20308842 is an abundant number, since it is smaller than the sum of its proper divisors (23779098).

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

20308842 is a wasteful number, since it uses less digits than its factorization.

20308842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2195 counting only the distinct ones).

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

The square root of 20308842 is about 4506.5332573942. The cubic root of 20308842 is about 272.8318410531.

The spelling of 20308842 in words is "twenty million, three hundred eight thousand, eight hundred forty-two".