21400302023 has 2 divisors, whose sum is σ = 21400302024. Its totient is φ = 21400302022.

The previous prime is 21400301983. The next prime is 21400302029. The reversal of 21400302023 is 32020300412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21400302023 - 2¹² = 21400297927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21400301992 and 21400302010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21400302029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700151011 + 10700151012.

It is an arithmetic number, because the mean of its divisors is an integer number (10700151012).

Almost surely, 2^21400302023 is an apocalyptic number.

21400302023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21400302023 is an equidigital number, since it uses as much as digits as its factorization.

21400302023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21400302023 its reverse (32020300412), we get a palindrome (53420602435).

The spelling of 21400302023 in words is "twenty-one billion, four hundred million, three hundred two thousand, twenty-three".