2626142021 has 4 divisors (see below), whose sum is σ = 2630164332. Its totient is φ = 2622119712.

The previous prime is 2626142011. The next prime is 2626142023. The reversal of 2626142021 is 1202416262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1634584900 + 991557121 = 40430^2 + 31489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2626142021 - 2¹⁴ = 2626125637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2626142023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010176 + ... + 2011481.

It is an arithmetic number, because the mean of its divisors is an integer number (657541083).

Almost surely, 2^2626142021 is an apocalyptic number.

It is an amenable number.

2626142021 is a deficient number, since it is larger than the sum of its proper divisors (4022311).

2626142021 is an equidigital number, since it uses as much as digits as its factorization.

2626142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022310.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2626142021 is about 51245.8976016617. The cubic root of 2626142021 is about 1379.6621067645.

Adding to 2626142021 its reverse (1202416262), we get a palindrome (3828558283).

The spelling of 2626142021 in words is "two billion, six hundred twenty-six million, one hundred forty-two thousand, twenty-one".