21960182653 has 4 divisors (see below), whose sum is σ = 23115981760. Its totient is φ = 20804383548.

The previous prime is 21960182617. The next prime is 21960182669. The reversal of 21960182653 is 35628106912.

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 a de Polignac number, because none of the positive numbers 2^k-21960182653 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 (21960182683) 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, 577899525 + ... + 577899562.

It is an arithmetic number, because the mean of its divisors is an integer number (5778995440).

Almost surely, 2^21960182653 is an apocalyptic number.

It is an amenable number.

21960182653 is a deficient number, since it is larger than the sum of its proper divisors (1155799107).

21960182653 is a wasteful number, since it uses less digits than its factorization.

21960182653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155799106.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 21960182653 in words is "twenty-one billion, nine hundred sixty million, one hundred eighty-two thousand, six hundred fifty-three".