20657988002 has 16 divisors (see below), whose sum is σ = 31077794880. Its totient is φ = 10298768592.

The previous prime is 20657987969. The next prime is 20657988059. The reversal of 20657988002 is 20088975602.

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 7 ways as a sum of consecutive naturals, for example, 955403 + ... + 976785.

It is an arithmetic number, because the mean of its divisors is an integer number (1942362180).

Almost surely, 2^20657988002 is an apocalyptic number.

20657988002 is a deficient number, since it is larger than the sum of its proper divisors (10419806878).

20657988002 is a wasteful number, since it uses less digits than its factorization.

20657988002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22777.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 20657988002 in words is "twenty billion, six hundred fifty-seven million, nine hundred eighty-eight thousand, two".