2918231421 has 64 divisors (see below), whose sum is σ = 4817387520. Its totient is φ = 1535244480.

The previous prime is 2918231317. The next prime is 2918231423. The reversal of 2918231421 is 1241328192.

It is not a de Polignac number, because 2918231421 - 2¹⁰ = 2918230397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2918231423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1473610 + ... + 1475588.

It is an arithmetic number, because the mean of its divisors is an integer number (75271680).

Almost surely, 2^2918231421 is an apocalyptic number.

2918231421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2918231421 is a deficient number, since it is larger than the sum of its proper divisors (1899156099).

2918231421 is a wasteful number, since it uses less digits than its factorization.

2918231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its digits is 6912, while the sum is 33.

The square root of 2918231421 is about 54020.6573543862. The cubic root of 2918231421 is about 1429.0252736130.

The spelling of 2918231421 in words is "two billion, nine hundred eighteen million, two hundred thirty-one thousand, four hundred twenty-one".