2106619887 has 16 divisors (see below), whose sum is σ = 2932554240. Its totient is φ = 1342616352.

The previous prime is 2106619883. The next prime is 2106619891. The reversal of 2106619887 is 7889166012.

It is an interprime number because it is at equal distance from previous prime (2106619883) and next prime (2106619891).

It is not a de Polignac number, because 2106619887 - 2² = 2106619883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106619883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136689 + ... + 151317.

It is an arithmetic number, because the mean of its divisors is an integer number (183284640).

Almost surely, 2^2106619887 is an apocalyptic number.

2106619887 is a deficient number, since it is larger than the sum of its proper divisors (825934353).

2106619887 is a wasteful number, since it uses less digits than its factorization.

2106619887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16742.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 2106619887 is about 45897.9290055663. The cubic root of 2106619887 is about 1281.9233550199.

The spelling of 2106619887 in words is "two billion, one hundred six million, six hundred nineteen thousand, eight hundred eighty-seven".