20191881006 has 48 divisors (see below), whose sum is σ = 47902503168. Its totient is φ = 6096157200.

The previous prime is 20191880993. The next prime is 20191881067. The reversal of 20191881006 is 60018819102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134496 + ... + 241811.

It is an arithmetic number, because the mean of its divisors is an integer number (997968816).

Almost surely, 2^20191881006 is an apocalyptic number.

20191881006 is an abundant number, since it is smaller than the sum of its proper divisors (27710622162).

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

20191881006 is a wasteful number, since it uses less digits than its factorization.

20191881006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376597 (or 376594 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 20191881006 in words is "twenty billion, one hundred ninety-one million, eight hundred eighty-one thousand, six".