21303522234 has 16 divisors (see below), whose sum is σ = 47341160640. Its totient is φ = 7101174060.

The previous prime is 21303522221. The next prime is 21303522271. The reversal of 21303522234 is 43222530312.

21303522234 is a `hidden beast` number, since 2 + 130 + 3 + 522 + 2 + 3 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21303522198 and 21303522207.

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, 197254782 + ... + 197254889.

It is an arithmetic number, because the mean of its divisors is an integer number (2958822540).

Almost surely, 2^21303522234 is an apocalyptic number.

21303522234 is an abundant number, since it is smaller than the sum of its proper divisors (26037638406).

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

21303522234 is a wasteful number, since it uses less digits than its factorization.

21303522234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394509682 (or 394509676 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The spelling of 21303522234 in words is "twenty-one billion, three hundred three million, five hundred twenty-two thousand, two hundred thirty-four".