21404221358 has 8 divisors (see below), whose sum is σ = 34576049928. Its totient is φ = 9878871384.

The previous prime is 21404221357. The next prime is 21404221381. The reversal of 21404221358 is 85312240412.

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 (21404221357) 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, 411619616 + ... + 411619667.

It is an arithmetic number, because the mean of its divisors is an integer number (4322006241).

Almost surely, 2^21404221358 is an apocalyptic number.

21404221358 is a deficient number, since it is larger than the sum of its proper divisors (13171828570).

21404221358 is a wasteful number, since it uses less digits than its factorization.

21404221358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823239298.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 21404221358 in words is "twenty-one billion, four hundred four million, two hundred twenty-one thousand, three hundred fifty-eight".