21472400071 has 2 divisors, whose sum is σ = 21472400072. Its totient is φ = 21472400070.

The previous prime is 21472400051. The next prime is 21472400083. The reversal of 21472400071 is 17000427412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21472400071 - 2¹³ = 21472391879 is a prime.

It is a super-2 number, since 2×21472400071² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21472400041) 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 as a sum of consecutive naturals, namely, 10736200035 + 10736200036.

It is an arithmetic number, because the mean of its divisors is an integer number (10736200036).

Almost surely, 2^21472400071 is an apocalyptic number.

21472400071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21472400071 is an equidigital number, since it uses as much as digits as its factorization.

21472400071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 28.

Adding to 21472400071 its reverse (17000427412), we get a palindrome (38472827483).

The spelling of 21472400071 in words is "twenty-one billion, four hundred seventy-two million, four hundred thousand, seventy-one".