21203014234 has 16 divisors (see below), whose sum is σ = 32127361056. Its totient is φ = 10493946000.

The previous prime is 21203014229. The next prime is 21203014237. The reversal of 21203014234 is 43241030212.

It is not an unprimeable number, because it can be changed into a prime (21203014237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001749 + ... + 1022695.

It is an arithmetic number, because the mean of its divisors is an integer number (2007960066).

Almost surely, 2^21203014234 is an apocalyptic number.

21203014234 is a deficient number, since it is larger than the sum of its proper divisors (10924346822).

21203014234 is a wasteful number, since it uses less digits than its factorization.

21203014234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26061.

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

Adding to 21203014234 its reverse (43241030212), we get a palindrome (64444044446).

The spelling of 21203014234 in words is "twenty-one billion, two hundred three million, fourteen thousand, two hundred thirty-four".