2100420015 has 16 divisors (see below), whose sum is σ = 3415766496. Its totient is φ = 1101859200.

The previous prime is 2100419977. The next prime is 2100420019. The reversal of 2100420015 is 5100240012.

It is not a de Polignac number, because 2100420015 - 2¹³ = 2100411823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 2100419976 and 2100420003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100420019) 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, 1146856 + ... + 1148685.

It is an arithmetic number, because the mean of its divisors is an integer number (213485406).

Almost surely, 2^2100420015 is an apocalyptic number.

2100420015 is a deficient number, since it is larger than the sum of its proper divisors (1315346481).

2100420015 is a wasteful number, since it uses less digits than its factorization.

2100420015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295610.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2100420015 is about 45830.3394597945. The cubic root of 2100420015 is about 1280.6645342896.

Adding to 2100420015 its reverse (5100240012), we get a palindrome (7200660027).

The spelling of 2100420015 in words is "two billion, one hundred million, four hundred twenty thousand, fifteen".