2518466021 has 2 divisors, whose sum is σ = 2518466022. Its totient is φ = 2518466020.

The previous prime is 2518465967. The next prime is 2518466023. The reversal of 2518466021 is 1206648152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2161785025 + 356680996 = 46495^2 + 18886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2518466021 is a prime.

Together with 2518466023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2518466023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259233010 + 1259233011.

It is an arithmetic number, because the mean of its divisors is an integer number (1259233011).

Almost surely, 2^2518466021 is an apocalyptic number.

It is an amenable number.

2518466021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2518466021 is an equidigital number, since it uses as much as digits as its factorization.

2518466021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 2518466021 is about 50184.3204696447. The cubic root of 2518466021 is about 1360.5422471868.

The spelling of 2518466021 in words is "two billion, five hundred eighteen million, four hundred sixty-six thousand, twenty-one".