2100018557 has 16 divisors (see below), whose sum is σ = 2673767040. Its totient is φ = 1604256192.

The previous prime is 2100018497. The next prime is 2100018559. The reversal of 2100018557 is 7558100012.

It is not a de Polignac number, because 2100018557 - 2⁶ = 2100018493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100018559) 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, 395243 + ... + 400520.

It is an arithmetic number, because the mean of its divisors is an integer number (167110440).

Almost surely, 2^2100018557 is an apocalyptic number.

It is an amenable number.

2100018557 is a deficient number, since it is larger than the sum of its proper divisors (573748483).

2100018557 is a wasteful number, since it uses less digits than its factorization.

2100018557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795812.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 2100018557 is about 45825.9594225806. The cubic root of 2100018557 is about 1280.5829369935.

Adding to 2100018557 its reverse (7558100012), we get a palindrome (9658118569).

The spelling of 2100018557 in words is "two billion, one hundred million, eighteen thousand, five hundred fifty-seven".