21344842488 has 32 divisors (see below), whose sum is σ = 53413925760. Its totient is φ = 7108038240.

The previous prime is 21344842457. The next prime is 21344842489. The reversal of 21344842488 is 88424844312.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344842489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406570 + ... + 456057.

It is an arithmetic number, because the mean of its divisors is an integer number (1669185180).

Almost surely, 2^21344842488 is an apocalyptic number.

It is an amenable number.

21344842488 is an abundant number, since it is smaller than the sum of its proper divisors (32069083272).

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

21344842488 is a wasteful number, since it uses less digits than its factorization.

21344842488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863667 (or 863663 counting only the distinct ones).

The product of its digits is 1572864, while the sum is 48.

The spelling of 21344842488 in words is "twenty-one billion, three hundred forty-four million, eight hundred forty-two thousand, four hundred eighty-eight".