21340012030 has 16 divisors (see below), whose sum is σ = 40082109984. Its totient is φ = 8164874080.

The previous prime is 21340012019. The next prime is 21340012037. The reversal of 21340012030 is 3021004312.

It is a happy number.

It is a super-2 number, since 2×21340012030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21340011995 and 21340012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340012037) 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, 46391101 + ... + 46391560.

It is an arithmetic number, because the mean of its divisors is an integer number (2505131874).

Almost surely, 2^21340012030 is an apocalyptic number.

21340012030 is a deficient number, since it is larger than the sum of its proper divisors (18742097954).

21340012030 is a wasteful number, since it uses less digits than its factorization.

21340012030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92782691.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21340012030 its reverse (3021004312), we get a palindrome (24361016342).

The spelling of 21340012030 in words is "twenty-one billion, three hundred forty million, twelve thousand, thirty".