2293478021 has 6 divisors (see below), whose sum is σ = 2372830290. Its totient is φ = 2214143568.

The previous prime is 2293478009. The next prime is 2293478027. The reversal of 2293478021 is 1208743922.

It can be written as a sum of positive squares in 3 ways, for example, as 25921 + 2293452100 = 161^2 + 47890^2 .

It is not a de Polignac number, because 2293478021 - 2¹⁴ = 2293461637 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 (2293478027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253451 + ... + 262343.

It is an arithmetic number, because the mean of its divisors is an integer number (395471715).

Almost surely, 2^2293478021 is an apocalyptic number.

It is an amenable number.

2293478021 is a deficient number, since it is larger than the sum of its proper divisors (79352269).

2293478021 is an frugal number, since it uses more digits than its factorization.

2293478021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17815 (or 8922 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2293478021 is about 47890.2706298471. The cubic root of 2293478021 is about 1318.7572518757.

The spelling of 2293478021 in words is "two billion, two hundred ninety-three million, four hundred seventy-eight thousand, twenty-one".