21430142304 has 48 divisors (see below), whose sum is σ = 56353132080. Its totient is φ = 7130808320.

The previous prime is 21430142299. The next prime is 21430142311. The reversal of 21430142304 is 40324103412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 141537 + ... + 250784.

It is an arithmetic number, because the mean of its divisors is an integer number (1174023585).

Almost surely, 2^21430142304 is an apocalyptic number.

21430142304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21430142304 is an abundant number, since it is smaller than the sum of its proper divisors (34922989776).

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

21430142304 is a wasteful number, since it uses less digits than its factorization.

21430142304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392903 (or 392895 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21430142304 its reverse (40324103412), we get a palindrome (61754245716).

The spelling of 21430142304 in words is "twenty-one billion, four hundred thirty million, one hundred forty-two thousand, three hundred four".