21313353134 has 8 divisors (see below), whose sum is σ = 32181752208. Its totient is φ = 10586102400.

The previous prime is 21313353109. The next prime is 21313353137. The reversal of 21313353134 is 43135331312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21313353097 and 21313353106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313353137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35286707 + ... + 35287310.

It is an arithmetic number, because the mean of its divisors is an integer number (4022719026).

Almost surely, 2^21313353134 is an apocalyptic number.

21313353134 is a deficient number, since it is larger than the sum of its proper divisors (10868399074).

21313353134 is a wasteful number, since it uses less digits than its factorization.

21313353134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70574170.

The product of its digits is 9720, while the sum is 29.

Adding to 21313353134 its reverse (43135331312), we get a palindrome (64448684446).

The spelling of 21313353134 in words is "twenty-one billion, three hundred thirteen million, three hundred fifty-three thousand, one hundred thirty-four".