21635229105139 has 24 divisors (see below), whose sum is σ = 23473625014752. Its totient is φ = 19931674613760.

The previous prime is 21635229105107. The next prime is 21635229105209. The reversal of 21635229105139 is 93150192253612.

It is not a de Polignac number, because 21635229105139 - 2⁵ = 21635229105107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21635229105092 and 21635229105101.

It is not an unprimeable number, because it can be changed into a prime (21635229105239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454679329 + ... + 454726909.

It is an arithmetic number, because the mean of its divisors is an integer number (978067708948).

Almost surely, 2^{21635229105139} is an apocalyptic number.

21635229105139 is a deficient number, since it is larger than the sum of its proper divisors (1838395909613).

21635229105139 is a wasteful number, since it uses less digits than its factorization.

21635229105139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52847 (or 52834 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 21635229105139 in words is "twenty-one trillion, six hundred thirty-five billion, two hundred twenty-nine million, one hundred five thousand, one hundred thirty-nine".