21424163064 has 32 divisors (see below), whose sum is σ = 53568000000. Its totient is φ = 7140375392.

The previous prime is 21424163041. The next prime is 21424163087. The reversal of 21424163064 is 46036142412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21424163041) and next prime (21424163087).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120457 + ... + 239495.

It is an arithmetic number, because the mean of its divisors is an integer number (1674000000).

Almost surely, 2^21424163064 is an apocalyptic number.

21424163064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21424163064 is an abundant number, since it is smaller than the sum of its proper divisors (32143836936).

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

21424163064 is a wasteful number, since it uses less digits than its factorization.

21424163064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126547 (or 126543 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 21424163064 in words is "twenty-one billion, four hundred twenty-four million, one hundred sixty-three thousand, sixty-four".