21134222350 has 24 divisors (see below), whose sum is σ = 41621987808. Its totient is φ = 7956412800.

The previous prime is 21134222311. The next prime is 21134222371. The reversal of 21134222350 is 5322243112.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12431046 + ... + 12432745.

It is an arithmetic number, because the mean of its divisors is an integer number (1734249492).

Almost surely, 2^21134222350 is an apocalyptic number.

21134222350 is a deficient number, since it is larger than the sum of its proper divisors (20487765458).

21134222350 is a wasteful number, since it uses less digits than its factorization.

21134222350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24863820 (or 24863815 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21134222350 its reverse (5322243112), we get a palindrome (26456465462).

The spelling of 21134222350 in words is "twenty-one billion, one hundred thirty-four million, two hundred twenty-two thousand, three hundred fifty".