2109453864 has 64 divisors (see below), whose sum is σ = 6033830400. Its totient is φ = 602019264.

The previous prime is 2109453847. The next prime is 2109453883. The reversal of 2109453864 is 4683549012.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 152467 + ... + 165725.

It is an arithmetic number, because the mean of its divisors is an integer number (94278600).

Almost surely, 2^2109453864 is an apocalyptic number.

2109453864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2109453864 is an abundant number, since it is smaller than the sum of its proper divisors (3924376536).

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

2109453864 is a wasteful number, since it uses less digits than its factorization.

2109453864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14222 (or 14218 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 2109453864 is about 45928.7912316447. The cubic root of 2109453864 is about 1282.4979426875.

The spelling of 2109453864 in words is "two billion, one hundred nine million, four hundred fifty-three thousand, eight hundred sixty-four".