23140455421 has 2 divisors, whose sum is σ = 23140455422. Its totient is φ = 23140455420.

The previous prime is 23140455407. The next prime is 23140455439. The reversal of 23140455421 is 12455404132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15397335396 + 7743120025 = 124086^2 + 87995^2 .

It is a cyclic number.

It is not a de Polignac number, because 23140455421 - 2⁵ = 23140455389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23140459421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11570227710 + 11570227711.

It is an arithmetic number, because the mean of its divisors is an integer number (11570227711).

Almost surely, 2^23140455421 is an apocalyptic number.

It is an amenable number.

23140455421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23140455421 is an equidigital number, since it uses as much as digits as its factorization.

23140455421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 23140455421 its reverse (12455404132), we get a palindrome (35595859553).

The spelling of 23140455421 in words is "twenty-three billion, one hundred forty million, four hundred fifty-five thousand, four hundred twenty-one".