21434300344 has 8 divisors (see below), whose sum is σ = 40189313160. Its totient is φ = 10717150168.

The previous prime is 21434300341. The next prime is 21434300347. The reversal of 21434300344 is 44300343412.

It is an interprime number because it is at equal distance from previous prime (21434300341) and next prime (21434300347).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434300341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339643764 + ... + 1339643779.

It is an arithmetic number, because the mean of its divisors is an integer number (5023664145).

Almost surely, 2^21434300344 is an apocalyptic number.

It is an amenable number.

21434300344 is a deficient number, since it is larger than the sum of its proper divisors (18755012816).

21434300344 is a wasteful number, since it uses less digits than its factorization.

21434300344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679287549 (or 2679287545 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21434300344 its reverse (44300343412), we get a palindrome (65734643756).

The spelling of 21434300344 in words is "twenty-one billion, four hundred thirty-four million, three hundred thousand, three hundred forty-four".