20168995902 has 32 divisors (see below), whose sum is σ = 44041895424. Its totient is φ = 6106704000.

The previous prime is 20168995871. The next prime is 20168995927. The reversal of 20168995902 is 20959986102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47958 + ... + 206489.

It is an arithmetic number, because the mean of its divisors is an integer number (1376309232).

Almost surely, 2^20168995902 is an apocalyptic number.

20168995902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20168995902 is an abundant number, since it is smaller than the sum of its proper divisors (23872899522).

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

20168995902 is a wasteful number, since it uses less digits than its factorization.

20168995902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255664.

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 20168995902 in words is "twenty billion, one hundred sixty-eight million, nine hundred ninety-five thousand, nine hundred two".