21333878486 has 8 divisors (see below), whose sum is σ = 32009401344. Its totient is φ = 10664078040.

The previous prime is 21333878483. The next prime is 21333878569. The reversal of 21333878486 is 68487833312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333878483) 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, 1421270 + ... + 1436201.

It is an arithmetic number, because the mean of its divisors is an integer number (4001175168).

Almost surely, 2^21333878486 is an apocalyptic number.

21333878486 is a deficient number, since it is larger than the sum of its proper divisors (10675522858).

21333878486 is a wasteful number, since it uses less digits than its factorization.

21333878486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861206.

The product of its digits is 4644864, while the sum is 53.

The spelling of 21333878486 in words is "twenty-one billion, three hundred thirty-three million, eight hundred seventy-eight thousand, four hundred eighty-six".