20570149908 has 480 divisors, whose sum is σ = 69972553728. Its totient is φ = 5115052800.

The previous prime is 20570149867. The next prime is 20570149927. The reversal of 20570149908 is 80994107502.

It is a congruent 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 159 ways as a sum of consecutive naturals, for example, 62145303 + ... + 62145633.

Almost surely, 2^20570149908 is an apocalyptic number.

20570149908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20570149908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34986276864).

20570149908 is an abundant number, since it is smaller than the sum of its proper divisors (49402403820).

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

20570149908 is a wasteful number, since it uses less digits than its factorization.

20570149908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 20570149908 in words is "twenty billion, five hundred seventy million, one hundred forty-nine thousand, nine hundred eight".