20159218100 has 36 divisors (see below), whose sum is σ = 49994862624. Its totient is φ = 6911731680.

The previous prime is 20159218087. The next prime is 20159218109. The reversal of 20159218100 is 181295102.

It is a super-2 number, since 2×20159218100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20159218109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14398742 + ... + 14400141.

It is an arithmetic number, because the mean of its divisors is an integer number (1388746184).

Almost surely, 2^20159218100 is an apocalyptic number.

20159218100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20159218100 is an abundant number, since it is smaller than the sum of its proper divisors (29835644524).

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

20159218100 is a wasteful number, since it uses less digits than its factorization.

20159218100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28798904 (or 28798897 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 20159218100 in words is "twenty billion, one hundred fifty-nine million, two hundred eighteen thousand, one hundred".