21624004100471 has 2 divisors, whose sum is σ = 21624004100472. Its totient is φ = 21624004100470.

The previous prime is 21624004100401. The next prime is 21624004100477. The reversal of 21624004100471 is 17400140042612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21624004100471 - 2²² = 21623999906167 is a prime.

It is a super-3 number, since 3×21624004100471³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21624004100477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10812002050235 + 10812002050236.

It is an arithmetic number, because the mean of its divisors is an integer number (10812002050236).

Almost surely, 2^{21624004100471} is an apocalyptic number.

21624004100471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21624004100471 is an equidigital number, since it uses as much as digits as its factorization.

21624004100471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 21624004100471 in words is "twenty-one trillion, six hundred twenty-four billion, four million, one hundred thousand, four hundred seventy-one".