21404510318 has 8 divisors (see below), whose sum is σ = 32111052480. Its totient is φ = 10700826160.

The previous prime is 21404510317. The next prime is 21404510329. The reversal of 21404510318 is 81301540412.

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

It is a super-2 number, since 2×21404510318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404510317) 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, 695678 + ... + 725793.

It is an arithmetic number, because the mean of its divisors is an integer number (4013881560).

Almost surely, 2^21404510318 is an apocalyptic number.

21404510318 is a deficient number, since it is larger than the sum of its proper divisors (10706542162).

21404510318 is a wasteful number, since it uses less digits than its factorization.

21404510318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429002.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 21404510318 in words is "twenty-one billion, four hundred four million, five hundred ten thousand, three hundred eighteen".