2091305642 has 16 divisors (see below), whose sum is σ = 3303936960. Its totient is φ = 990055872.

The previous prime is 2091305633. The next prime is 2091305651. The reversal of 2091305642 is 2465031902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2091305633) and next prime (2091305651).

It is a super-2 number, since 2×2091305642² = 8747118576522064328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2091305599 and 2091305608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56483 + ... + 85865.

It is an arithmetic number, because the mean of its divisors is an integer number (206496060).

Almost surely, 2^2091305642 is an apocalyptic number.

2091305642 is a deficient number, since it is larger than the sum of its proper divisors (1212631318).

2091305642 is a wasteful number, since it uses less digits than its factorization.

2091305642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31277.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2091305642 is about 45730.7953353099. The cubic root of 2091305642 is about 1278.8094484093.

The spelling of 2091305642 in words is "two billion, ninety-one million, three hundred five thousand, six hundred forty-two".