2489426021 has 4 divisors (see below), whose sum is σ = 2489973792. Its totient is φ = 2488878252.

The previous prime is 2489426011. The next prime is 2489426053. The reversal of 2489426021 is 1206249842.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2489426021 - 2¹⁸ = 2489163877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489426011) 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, 267011 + ... + 276176.

It is an arithmetic number, because the mean of its divisors is an integer number (622493448).

Almost surely, 2^2489426021 is an apocalyptic number.

It is an amenable number.

2489426021 is a deficient number, since it is larger than the sum of its proper divisors (547771).

2489426021 is an equidigital number, since it uses as much as digits as its factorization.

2489426021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547770.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 2489426021 is about 49894.1481638879. The cubic root of 2489426021 is about 1355.2926245363.

The spelling of 2489426021 in words is "two billion, four hundred eighty-nine million, four hundred twenty-six thousand, twenty-one".