21502276093 has 4 divisors (see below), whose sum is σ = 21546069408. Its totient is φ = 21458482780.

The previous prime is 21502276091. The next prime is 21502276097. The reversal of 21502276093 is 39067220512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21502276093 - 2¹ = 21502276091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21502276091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21895921 + ... + 21896902.

It is an arithmetic number, because the mean of its divisors is an integer number (5386517352).

Almost surely, 2^21502276093 is an apocalyptic number.

It is an amenable number.

21502276093 is a deficient number, since it is larger than the sum of its proper divisors (43793315).

21502276093 is an equidigital number, since it uses as much as digits as its factorization.

21502276093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43793314.

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

The spelling of 21502276093 in words is "twenty-one billion, five hundred two million, two hundred seventy-six thousand, ninety-three".