21143804142888 has 320 divisors, whose sum is σ = 71128383596160. Its totient is φ = 5741118964224.

The previous prime is 21143804142883. The next prime is 21143804142899. The reversal of 21143804142888 is 88824140834112.

21143804142888 is a `hidden beast` number, since 2 + 1 + 143 + 8 + 0 + 414 + 2 + 8 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21143804142883) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5751870 + ... + 8681682.

It is an arithmetic number, because the mean of its divisors is an integer number (222276198738).

Almost surely, 2^{21143804142888} is an apocalyptic number.

21143804142888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21143804142888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35564191798080).

21143804142888 is an abundant number, since it is smaller than the sum of its proper divisors (49984579453272).

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

21143804142888 is a wasteful number, since it uses less digits than its factorization.

21143804142888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929918 (or 2929905 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 54.

The spelling of 21143804142888 in words is "twenty-one trillion, one hundred forty-three billion, eight hundred four million, one hundred forty-two thousand, eight hundred eighty-eight".