2100621623 has 2 divisors, whose sum is σ = 2100621624. Its totient is φ = 2100621622.

The previous prime is 2100621617. The next prime is 2100621667. The reversal of 2100621623 is 3261260012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100621623 - 2¹² = 2100617527 is a prime.

It is a super-2 number, since 2×2100621623² = 8825222406030308258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100626623) 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 as a sum of consecutive naturals, namely, 1050310811 + 1050310812.

It is an arithmetic number, because the mean of its divisors is an integer number (1050310812).

Almost surely, 2^2100621623 is an apocalyptic number.

2100621623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100621623 is an equidigital number, since it uses as much as digits as its factorization.

2100621623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2100621623 is about 45832.5389106910. The cubic root of 2100621623 is about 1280.7055076748.

Adding to 2100621623 its reverse (3261260012), we get a palindrome (5361881635).

The spelling of 2100621623 in words is "two billion, one hundred million, six hundred twenty-one thousand, six hundred twenty-three".