21346144014 has 64 divisors (see below), whose sum is σ = 48553634304. Its totient is φ = 6206741376.

The previous prime is 21346144013. The next prime is 21346144031. The reversal of 21346144014 is 41044164312.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21346144013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77224 + ... + 220580.

It is an arithmetic number, because the mean of its divisors is an integer number (758650536).

Almost surely, 2^21346144014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21346144014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24276817152).

21346144014 is an abundant number, since it is smaller than the sum of its proper divisors (27207490290).

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

21346144014 is a wasteful number, since it uses less digits than its factorization.

21346144014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143481.

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 21346144014 in words is "twenty-one billion, three hundred forty-six million, one hundred forty-four thousand, fourteen".