2100620055 has 16 divisors (see below), whose sum is σ = 3451830624. Its totient is φ = 1090051200.

The previous prime is 2100620051. The next prime is 2100620057. The reversal of 2100620055 is 5500260012.

It is not a de Polignac number, because 2100620055 - 2² = 2100620051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100620051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1891896 + ... + 1893005.

It is an arithmetic number, because the mean of its divisors is an integer number (215739414).

Almost surely, 2^2100620055 is an apocalyptic number.

2100620055 is a deficient number, since it is larger than the sum of its proper divisors (1351210569).

2100620055 is a wasteful number, since it uses less digits than its factorization.

2100620055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784946.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2100620055 is about 45832.5218049367. The cubic root of 2100620055 is about 1280.7051890157.

Adding to 2100620055 its reverse (5500260012), we get a palindrome (7600880067).

The spelling of 2100620055 in words is "two billion, one hundred million, six hundred twenty thousand, fifty-five".