21010232434 has 16 divisors (see below), whose sum is σ = 32481187200. Its totient is φ = 10187271504.

The previous prime is 21010232401. The next prime is 21010232437. The reversal of 21010232434 is 43423201012.

It is not an unprimeable number, because it can be changed into a prime (21010232437) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1015044 + ... + 1035535.

It is an arithmetic number, because the mean of its divisors is an integer number (2030074200).

Almost surely, 2^21010232434 is an apocalyptic number.

21010232434 is a deficient number, since it is larger than the sum of its proper divisors (11470954766).

21010232434 is a wasteful number, since it uses less digits than its factorization.

21010232434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050737.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21010232434 its reverse (43423201012), we get a palindrome (64433433446).

The spelling of 21010232434 in words is "twenty-one billion, ten million, two hundred thirty-two thousand, four hundred thirty-four".