2518978420 has 24 divisors (see below), whose sum is σ = 6045548544. Its totient is φ = 863649696.

The previous prime is 2518978381. The next prime is 2518978457. The reversal of 2518978420 is 248798152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8996212 + ... + 8996491.

It is an arithmetic number, because the mean of its divisors is an integer number (251897856).

Almost surely, 2^2518978420 is an apocalyptic number.

2518978420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2518978420 is an abundant number, since it is smaller than the sum of its proper divisors (3526570124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2518978420 is a wasteful number, since it uses less digits than its factorization.

2518978420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17992719 (or 17992717 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 2518978420 is about 50189.4253802532. The cubic root of 2518978420 is about 1360.6345114470.

The spelling of 2518978420 in words is "two billion, five hundred eighteen million, nine hundred seventy-eight thousand, four hundred twenty".