21432301434 has 40 divisors (see below), whose sum is σ = 48091285440. Its totient is φ = 7134125544.

The previous prime is 21432301381. The next prime is 21432301447. The reversal of 21432301434 is 43410323412.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21432301398 and 21432301407.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24477 + ... + 208479.

It is an arithmetic number, because the mean of its divisors is an integer number (1202282136).

Almost surely, 2^21432301434 is an apocalyptic number.

21432301434 is an abundant number, since it is smaller than the sum of its proper divisors (26658984006).

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

21432301434 is a wasteful number, since it uses less digits than its factorization.

21432301434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184736 (or 184727 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21432301434 its reverse (43410323412), we get a palindrome (64842624846).

The spelling of 21432301434 in words is "twenty-one billion, four hundred thirty-two million, three hundred one thousand, four hundred thirty-four".