2126205810 has 48 divisors (see below), whose sum is σ = 5853323736. Its totient is φ = 533635584.

The previous prime is 2126205799. The next prime is 2126205841. The reversal of 2126205810 is 185026212.

It is a happy number.

2126205810 is a `hidden beast` number, since 21 + 2 + 62 + 0 + 581 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2021491521 + 104714289 = 44961^2 + 10233^2 .

It is a super-2 number, since 2×2126205810² = 9041502292955512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 693309 + ... + 696368.

Almost surely, 2^2126205810 is an apocalyptic number.

2126205810 is an abundant number, since it is smaller than the sum of its proper divisors (3727117926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2126205810 is a wasteful number, since it uses less digits than its factorization.

2126205810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389707 (or 1389704 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2126205810 is about 46110.7992773927. The cubic root of 2126205810 is about 1285.8839240189.

It can be divided in two parts, 2126 and 205810, that added together give a square (207936 = 456²).

The spelling of 2126205810 in words is "two billion, one hundred twenty-six million, two hundred five thousand, eight hundred ten".