2109669012 has 72 divisors (see below), whose sum is σ = 5875283232. Its totient is φ = 632952000.

The previous prime is 2109669007. The next prime is 2109669041.

2109669012 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2109669012² = 8901406680386112288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13623 + ... + 66369.

It is an arithmetic number, because the mean of its divisors is an integer number (81601156).

Almost surely, 2^2109669012 is an apocalyptic number.

2109669012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2109669012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2937641616).

2109669012 is an abundant number, since it is smaller than the sum of its proper divisors (3765614220).

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

2109669012 is a wasteful number, since it uses less digits than its factorization.

2109669012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52869 (or 52864 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 2109669012 is about 45931.1333628945. The cubic root of 2109669012 is about 1282.5415428332.

The spelling of 2109669012 in words is "two billion, one hundred nine million, six hundred sixty-nine thousand, twelve".