21050272963 has 4 divisors (see below), whose sum is σ = 21061348128. Its totient is φ = 21039197800.

The previous prime is 21050272939. The next prime is 21050273009. The reversal of 21050272963 is 36927205012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21050272963 - 2²⁹ = 20513402051 is a prime.

It is a super-2 number, since 2×21050272963² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21050272363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534731 + ... + 5538532.

It is an arithmetic number, because the mean of its divisors is an integer number (5265337032).

Almost surely, 2^21050272963 is an apocalyptic number.

21050272963 is a deficient number, since it is larger than the sum of its proper divisors (11075165).

21050272963 is a wasteful number, since it uses less digits than its factorization.

21050272963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075164.

The product of its (nonzero) digits is 45360, while the sum is 37.

Adding to 21050272963 its reverse (36927205012), we get a palindrome (57977477975).

The spelling of 21050272963 in words is "twenty-one billion, fifty million, two hundred seventy-two thousand, nine hundred sixty-three".