2418721840 has 20 divisors (see below), whose sum is σ = 5623528464. Its totient is φ = 967488704.

The previous prime is 2418721787. The next prime is 2418721847. The reversal of 2418721840 is 481278142.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 2418721840.

It is not an unprimeable number, because it can be changed into a prime (2418721847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15116932 + ... + 15117091.

Almost surely, 2^2418721840 is an apocalyptic number.

2418721840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2418721840 is an abundant number, since it is smaller than the sum of its proper divisors (3204806624).

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

2418721840 is a wasteful number, since it uses less digits than its factorization.

2418721840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30234036 (or 30234030 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 2418721840 is about 49180.5026407824. The cubic root of 2418721840 is about 1342.3382801752.

Adding to 2418721840 its reverse (481278142), we get a palindrome (2899999982).

The spelling of 2418721840 in words is "two billion, four hundred eighteen million, seven hundred twenty-one thousand, eight hundred forty".