21232001334 has 16 divisors (see below), whose sum is σ = 42465650688. Its totient is φ = 7077059112.

The previous prime is 21232001303. The next prime is 21232001359. The reversal of 21232001334 is 43310023212.

It is a self number, because there is not a number n which added to its sum of digits gives 21232001334.

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, 154719 + ... + 257685.

It is an arithmetic number, because the mean of its divisors is an integer number (2654103168).

Almost surely, 2^21232001334 is an apocalyptic number.

21232001334 is an abundant number, since it is smaller than the sum of its proper divisors (21233649354).

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

21232001334 is a wasteful number, since it uses less digits than its factorization.

21232001334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137339.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21232001334 its reverse (43310023212), we get a palindrome (64542024546).

The spelling of 21232001334 in words is "twenty-one billion, two hundred thirty-two million, one thousand, three hundred thirty-four".