21429995811407 has 2 divisors, whose sum is σ = 21429995811408. Its totient is φ = 21429995811406.

The previous prime is 21429995811401. The next prime is 21429995811457. The reversal of 21429995811407 is 70411859992412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21429995811407 - 2³⁸ = 21155117904463 is a prime.

It is a super-2 number, since 2×21429995811407² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21429995811407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21429995811401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10714997905703 + 10714997905704.

It is an arithmetic number, because the mean of its divisors is an integer number (10714997905704).

Almost surely, 2^{21429995811407} is an apocalyptic number.

21429995811407 is a deficient number, since it is larger than the sum of its proper divisors (1).

21429995811407 is an equidigital number, since it uses as much as digits as its factorization.

21429995811407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 21429995811407 in words is "twenty-one trillion, four hundred twenty-nine billion, nine hundred ninety-five million, eight hundred eleven thousand, four hundred seven".