2100421450 has 12 divisors (see below), whose sum is σ = 3906783990. Its totient is φ = 840168560.

The previous prime is 2100421409. The next prime is 2100421459. The reversal of 2100421450 is 541240012.

It can be written as a sum of positive squares in 3 ways, for example, as 1096735689 + 1003685761 = 33117^2 + 31681^2 .

It is not an unprimeable number, because it can be changed into a prime (2100421459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21004165 + ... + 21004264.

Almost surely, 2^2100421450 is an apocalyptic number.

2100421450 is a deficient number, since it is larger than the sum of its proper divisors (1806362540).

2100421450 is a wasteful number, since it uses less digits than its factorization.

2100421450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42008441 (or 42008436 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2100421450 is about 45830.3551153600. The cubic root of 2100421450 is about 1280.6648259381.

Adding to 2100421450 its reverse (541240012), we get a palindrome (2641661462).

The spelling of 2100421450 in words is "two billion, one hundred million, four hundred twenty-one thousand, four hundred fifty".