21353025234 has 16 divisors (see below), whose sum is σ = 43406150400. Its totient is φ = 7000991760.

The previous prime is 21353025233. The next prime is 21353025241. The reversal of 21353025234 is 43252035312.

It is not an unprimeable number, because it can be changed into a prime (21353025233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29170434 + ... + 29171165.

It is an arithmetic number, because the mean of its divisors is an integer number (2712884400).

Almost surely, 2^21353025234 is an apocalyptic number.

21353025234 is an abundant number, since it is smaller than the sum of its proper divisors (22053125166).

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

21353025234 is a wasteful number, since it uses less digits than its factorization.

21353025234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58341665.

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 21353025234 in words is "twenty-one billion, three hundred fifty-three million, twenty-five thousand, two hundred thirty-four".