21340433304 has 24 divisors (see below), whose sum is σ = 57797007060. Its totient is φ = 7113477744.

The previous prime is 21340433297. The next prime is 21340433311. The reversal of 21340433304 is 40333404312.

It is an interprime number because it is at equal distance from previous prime (21340433297) and next prime (21340433311).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148197382 + ... + 148197525.

Almost surely, 2^21340433304 is an apocalyptic number.

21340433304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21340433304 is an abundant number, since it is smaller than the sum of its proper divisors (36456573756).

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

21340433304 is a wasteful number, since it uses less digits than its factorization.

21340433304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296394919 (or 296394912 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21340433304 its reverse (40333404312), we get a palindrome (61673837616).

The spelling of 21340433304 in words is "twenty-one billion, three hundred forty million, four hundred thirty-three thousand, three hundred four".