21230074351 has 4 divisors (see below), whose sum is σ = 22478902272. Its totient is φ = 19981246432.

The previous prime is 21230074343. The next prime is 21230074387. The reversal of 21230074351 is 15347003212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21230074351 - 2³ = 21230074343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230075351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624413935 + ... + 624413968.

It is an arithmetic number, because the mean of its divisors is an integer number (5619725568).

Almost surely, 2^21230074351 is an apocalyptic number.

21230074351 is a deficient number, since it is larger than the sum of its proper divisors (1248827921).

21230074351 is a wasteful number, since it uses less digits than its factorization.

21230074351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248827920.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 21230074351 its reverse (15347003212), we get a palindrome (36577077563).

The spelling of 21230074351 in words is "twenty-one billion, two hundred thirty million, seventy-four thousand, three hundred fifty-one".