21142400327 has 2 divisors, whose sum is σ = 21142400328. Its totient is φ = 21142400326.

The previous prime is 21142400299. The next prime is 21142400333. The reversal of 21142400327 is 72300424112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21142400327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21142400296 and 21142400305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142400527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571200163 + 10571200164.

It is an arithmetic number, because the mean of its divisors is an integer number (10571200164).

Almost surely, 2^21142400327 is an apocalyptic number.

21142400327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142400327 is an equidigital number, since it uses as much as digits as its factorization.

21142400327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 21142400327 its reverse (72300424112), we get a palindrome (93442824439).

The spelling of 21142400327 in words is "twenty-one billion, one hundred forty-two million, four hundred thousand, three hundred twenty-seven".