30400023421 has 4 divisors (see below), whose sum is σ = 30816462172. Its totient is φ = 29983584672.

The previous prime is 30400023419. The next prime is 30400023439. The reversal of 30400023421 is 12432000403.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9290839321 + 21109184100 = 96389^2 + 145290^2 .

It is a cyclic number.

It is not a de Polignac number, because 30400023421 - 2¹ = 30400023419 is a prime.

It is a super-2 number, since 2×30400023421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30400023461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208219266 + ... + 208219411.

It is an arithmetic number, because the mean of its divisors is an integer number (7704115543).

Almost surely, 2^30400023421 is an apocalyptic number.

It is an amenable number.

30400023421 is a deficient number, since it is larger than the sum of its proper divisors (416438751).

30400023421 is an equidigital number, since it uses as much as digits as its factorization.

30400023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416438750.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 30400023421 its reverse (12432000403), we get a palindrome (42832023824).

The spelling of 30400023421 in words is "thirty billion, four hundred million, twenty-three thousand, four hundred twenty-one".