21436631401234 has 16 divisors (see below), whose sum is σ = 36788849646336. Its totient is φ = 9177043075200.

The previous prime is 21436631401153. The next prime is 21436631401249. The reversal of 21436631401234 is 43210413663412.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 840375807 + ... + 840401314.

It is an arithmetic number, because the mean of its divisors is an integer number (2299303102896).

Almost surely, 2^{21436631401234} is an apocalyptic number.

21436631401234 is a deficient number, since it is larger than the sum of its proper divisors (15352218245102).

21436631401234 is a wasteful number, since it uses less digits than its factorization.

21436631401234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680778041.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 21436631401234 in words is "twenty-one trillion, four hundred thirty-six billion, six hundred thirty-one million, four hundred one thousand, two hundred thirty-four".