2109020902 has 4 divisors (see below), whose sum is σ = 3163531356. Its totient is φ = 1054510450.

The previous prime is 2109020887. The next prime is 2109020929. The reversal of 2109020902 is 2090209012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 527255224 + ... + 527255227.

It is an arithmetic number, because the mean of its divisors is an integer number (790882839).

Almost surely, 2^2109020902 is an apocalyptic number.

2109020902 is a deficient number, since it is larger than the sum of its proper divisors (1054510454).

2109020902 is a wasteful number, since it uses less digits than its factorization.

2109020902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054510453.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2109020902 is about 45924.0775846396. The cubic root of 2109020902 is about 1282.4101931397.

Adding to 2109020902 its reverse (2090209012), we get a palindrome (4199229914).

The spelling of 2109020902 in words is "two billion, one hundred nine million, twenty thousand, nine hundred two".