21113030434 has 16 divisors (see below), whose sum is σ = 31996261440. Its totient is φ = 10447733520.

The previous prime is 21113030431. The next prime is 21113030447. The reversal of 21113030434 is 43403031112.

It is not an unprimeable number, because it can be changed into a prime (21113030431) 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, 322069 + ... + 382039.

It is an arithmetic number, because the mean of its divisors is an integer number (1999766340).

Almost surely, 2^21113030434 is an apocalyptic number.

21113030434 is a deficient number, since it is larger than the sum of its proper divisors (10883231006).

21113030434 is a wasteful number, since it uses less digits than its factorization.

21113030434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61785.

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

Adding to 21113030434 its reverse (43403031112), we get a palindrome (64516061546).

The spelling of 21113030434 in words is "twenty-one billion, one hundred thirteen million, thirty thousand, four hundred thirty-four".