20270581508 has 24 divisors (see below), whose sum is σ = 36056442240. Its totient is φ = 9969402240.

The previous prime is 20270581493. The next prime is 20270581511. The reversal of 20270581508 is 80518507202.

It is a happy number.

It is an unprimeable number.

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, 40553 + ... + 205391.

It is an arithmetic number, because the mean of its divisors is an integer number (1502351760).

Almost surely, 2^20270581508 is an apocalyptic number.

It is an amenable number.

20270581508 is a deficient number, since it is larger than the sum of its proper divisors (15785860732).

20270581508 is a wasteful number, since it uses less digits than its factorization.

20270581508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165347 (or 165345 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The spelling of 20270581508 in words is "twenty billion, two hundred seventy million, five hundred eighty-one thousand, five hundred eight".