21030511034 has 16 divisors (see below), whose sum is σ = 34005680520. Its totient is φ = 9696870720.

The previous prime is 21030511031. The next prime is 21030511049. The reversal of 21030511034 is 43011503012.

It can be written as a sum of positive squares in 4 ways, for example, as 11190466225 + 9840044809 = 105785^2 + 99197^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21030510997 and 21030511015.

It is not an unprimeable number, because it can be changed into a prime (21030511031) 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, 369569 + ... + 422660.

Almost surely, 2^21030511034 is an apocalyptic number.

21030511034 is a deficient number, since it is larger than the sum of its proper divisors (12975169486).

21030511034 is a wasteful number, since it uses less digits than its factorization.

21030511034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793265.

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 21030511034 in words is "twenty-one billion, thirty million, five hundred eleven thousand, thirty-four".