24213781820 has 12 divisors (see below), whose sum is σ = 50848941864. Its totient is φ = 9685512720.

The previous prime is 24213781817. The next prime is 24213781831. The reversal of 24213781820 is 2818731242.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605344526 + ... + 605344565.

It is an arithmetic number, because the mean of its divisors is an integer number (4237411822).

Almost surely, 2^24213781820 is an apocalyptic number.

24213781820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24213781820 is an abundant number, since it is smaller than the sum of its proper divisors (26635160044).

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

24213781820 is a wasteful number, since it uses less digits than its factorization.

24213781820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210689100 (or 1210689098 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 24213781820 in words is "twenty-four billion, two hundred thirteen million, seven hundred eighty-one thousand, eight hundred twenty".