20109291102 has 12 divisors (see below), whose sum is σ = 43570130760. Its totient is φ = 6703097028.

The previous prime is 20109291073. The next prime is 20109291113. The reversal of 20109291102 is 20119290102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558591402 + ... + 558591437.

It is an arithmetic number, because the mean of its divisors is an integer number (3630844230).

Almost surely, 2^20109291102 is an apocalyptic number.

20109291102 is an abundant number, since it is smaller than the sum of its proper divisors (23460839658).

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

20109291102 is a wasteful number, since it uses less digits than its factorization.

20109291102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117182847 (or 1117182844 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 20109291102 in words is "twenty billion, one hundred nine million, two hundred ninety-one thousand, one hundred two".