20531036208 has 40 divisors (see below), whose sum is σ = 53044446208. Its totient is φ = 6842912832.

The previous prime is 20531036191. The next prime is 20531036209. The reversal of 20531036208 is 80263013502.

It is not an unprimeable number, because it can be changed into a prime (20531036209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552585 + ... + 588567.

Almost surely, 2^20531036208 is an apocalyptic number.

It is an amenable number.

20531036208 is an abundant number, since it is smaller than the sum of its proper divisors (32513410000).

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

20531036208 is a wasteful number, since it uses less digits than its factorization.

20531036208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47881 (or 47875 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 20531036208 in words is "twenty billion, five hundred thirty-one million, thirty-six thousand, two hundred eight".