21013310434 has 8 divisors (see below), whose sum is σ = 32252988240. Its totient is φ = 10262314356.

The previous prime is 21013310431. The next prime is 21013310459. The reversal of 21013310434 is 43401331012.

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

It is not an unprimeable number, because it can be changed into a prime (21013310431) 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, 122170324 + ... + 122170495.

It is an arithmetic number, because the mean of its divisors is an integer number (4031623530).

Almost surely, 2^21013310434 is an apocalyptic number.

21013310434 is a deficient number, since it is larger than the sum of its proper divisors (11239677806).

21013310434 is a wasteful number, since it uses less digits than its factorization.

21013310434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244340864.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21013310434 its reverse (43401331012), we get a palindrome (64414641446).

The spelling of 21013310434 in words is "twenty-one billion, thirteen million, three hundred ten thousand, four hundred thirty-four".