21430142004 has 24 divisors (see below), whose sum is σ = 50023921248. Its totient is φ = 7140486880.

The previous prime is 21430141981. The next prime is 21430142011. The reversal of 21430142004 is 40024103412.

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, 330762 + ... + 390209.

It is an arithmetic number, because the mean of its divisors is an integer number (2084330052).

Almost surely, 2^21430142004 is an apocalyptic number.

It is an amenable number.

21430142004 is an abundant number, since it is smaller than the sum of its proper divisors (28593779244).

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

21430142004 is a wasteful number, since it uses less digits than its factorization.

21430142004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723455 (or 723453 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21430142004 its reverse (40024103412), we get a palindrome (61454245416).

The spelling of 21430142004 in words is "twenty-one billion, four hundred thirty million, one hundred forty-two thousand, four".