2100863657 has 8 divisors (see below), whose sum is σ = 2153840640. Its totient is φ = 2047969440.

The previous prime is 2100863647. The next prime is 2100863671. The reversal of 2100863657 is 7563680012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100863657 - 2¹⁶ = 2100798121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100863657.

It is not an unprimeable number, because it can be changed into a prime (2100863647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32408 + ... + 72470.

It is an arithmetic number, because the mean of its divisors is an integer number (269230080).

Almost surely, 2^2100863657 is an apocalyptic number.

It is an amenable number.

2100863657 is a deficient number, since it is larger than the sum of its proper divisors (52976983).

2100863657 is a wasteful number, since it uses less digits than its factorization.

2100863657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41383.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 2100863657 is about 45835.1792513131. The cubic root of 2100863657 is about 1280.7546934918.

The spelling of 2100863657 in words is "two billion, one hundred million, eight hundred sixty-three thousand, six hundred fifty-seven".