23003400421 has 2 divisors, whose sum is σ = 23003400422. Its totient is φ = 23003400420.

The previous prime is 23003400373. The next prime is 23003400461. The reversal of 23003400421 is 12400430032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18002930625 + 5000469796 = 134175^2 + 70714^2 .

It is a cyclic number.

It is not a de Polignac number, because 23003400421 - 2²⁵ = 22969845989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23003400461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11501700210 + 11501700211.

It is an arithmetic number, because the mean of its divisors is an integer number (11501700211).

Almost surely, 2^23003400421 is an apocalyptic number.

It is an amenable number.

23003400421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23003400421 is an equidigital number, since it uses as much as digits as its factorization.

23003400421 is an evil number, because the sum of its binary digits is even.

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

Adding to 23003400421 its reverse (12400430032), we get a palindrome (35403830453).

The spelling of 23003400421 in words is "twenty-three billion, three million, four hundred thousand, four hundred twenty-one".