21550314235 has 32 divisors (see below), whose sum is σ = 27401587200. Its totient is φ = 16225136640.

The previous prime is 21550314229. The next prime is 21550314239. The reversal of 21550314235 is 53241305512.

It is not a de Polignac number, because 21550314235 - 2²¹ = 21548217083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21550314197 and 21550314206.

It is not an unprimeable number, because it can be changed into a prime (21550314239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13822386 + ... + 13823944.

It is an arithmetic number, because the mean of its divisors is an integer number (856299600).

Almost surely, 2^21550314235 is an apocalyptic number.

21550314235 is a deficient number, since it is larger than the sum of its proper divisors (5851272965).

21550314235 is a wasteful number, since it uses less digits than its factorization.

21550314235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 21550314235 its reverse (53241305512), we get a palindrome (74791619747).

The spelling of 21550314235 in words is "twenty-one billion, five hundred fifty million, three hundred fourteen thousand, two hundred thirty-five".