21276142635 has 16 divisors (see below), whose sum is σ = 37136540160. Its totient is φ = 10315705440.

The previous prime is 21276142631. The next prime is 21276142637. The reversal of 21276142635 is 53624167212.

It is not a de Polignac number, because 21276142635 - 2² = 21276142631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21276142593 and 21276142602.

It is not an unprimeable number, because it can be changed into a prime (21276142631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64472995 + ... + 64473324.

It is an arithmetic number, because the mean of its divisors is an integer number (2321033760).

Almost surely, 2^21276142635 is an apocalyptic number.

21276142635 is a deficient number, since it is larger than the sum of its proper divisors (15860397525).

21276142635 is a wasteful number, since it uses less digits than its factorization.

21276142635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128946338.

The product of its digits is 120960, while the sum is 39.

The spelling of 21276142635 in words is "twenty-one billion, two hundred seventy-six million, one hundred forty-two thousand, six hundred thirty-five".