21434312030 has 16 divisors (see below), whose sum is σ = 40259229984. Its totient is φ = 8200954080.

The previous prime is 21434312023. The next prime is 21434312041. The reversal of 21434312030 is 3021343412.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 21434311987 and 21434312005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46596101 + ... + 46596560.

It is an arithmetic number, because the mean of its divisors is an integer number (2516201874).

Almost surely, 2^21434312030 is an apocalyptic number.

21434312030 is a deficient number, since it is larger than the sum of its proper divisors (18824917954).

21434312030 is a wasteful number, since it uses less digits than its factorization.

21434312030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93192691.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21434312030 its reverse (3021343412), we get a palindrome (24455655442).

The spelling of 21434312030 in words is "twenty-one billion, four hundred thirty-four million, three hundred twelve thousand, thirty".