2918718621 has 48 divisors (see below), whose sum is σ = 5206970496. Its totient is φ = 1534163328.

The previous prime is 2918718589. The next prime is 2918718679. The reversal of 2918718621 is 1268178192.

2918718621 is a `hidden beast` number, since 2 + 9 + 1 + 8 + 7 + 18 + 621 = 666.

It is not a de Polignac number, because 2918718621 - 2⁵ = 2918718589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2918718721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233886 + ... + 246048.

It is an arithmetic number, because the mean of its divisors is an integer number (108478552).

Almost surely, 2^2918718621 is an apocalyptic number.

2918718621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2918718621 is a deficient number, since it is larger than the sum of its proper divisors (2288251875).

2918718621 is a wasteful number, since it uses less digits than its factorization.

2918718621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12482 (or 12479 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 2918718621 is about 54025.1665522653. The cubic root of 2918718621 is about 1429.1047946506.

The spelling of 2918718621 in words is "two billion, nine hundred eighteen million, seven hundred eighteen thousand, six hundred twenty-one".