21429601008415 has 8 divisors (see below), whose sum is σ = 27068969694960. Its totient is φ = 16241381816832.

The previous prime is 21429601008397. The next prime is 21429601008427. The reversal of 21429601008415 is 51480010692412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21429601008415 is a prime.

It is a super-2 number, since 2×21429601008415² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112787373634 + ... + 112787373823.

It is an arithmetic number, because the mean of its divisors is an integer number (3383621211870).

Almost surely, 2^{21429601008415} is an apocalyptic number.

21429601008415 is a deficient number, since it is larger than the sum of its proper divisors (5639368686545).

21429601008415 is a wasteful number, since it uses less digits than its factorization.

21429601008415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225574747481.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 21429601008415 in words is "twenty-one trillion, four hundred twenty-nine billion, six hundred one million, eight thousand, four hundred fifteen".