20696376909 has 8 divisors (see below), whose sum is σ = 29717874592. Its totient is φ = 12736231920.

The previous prime is 20696376907. The next prime is 20696376919. The reversal of 20696376909 is 90967369602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20696376909 - 2¹ = 20696376907 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 (20696376907) 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 7 ways as a sum of consecutive naturals, for example, 265338127 + ... + 265338204.

It is an arithmetic number, because the mean of its divisors is an integer number (3714734324).

Almost surely, 2^20696376909 is an apocalyptic number.

It is an amenable number.

20696376909 is a deficient number, since it is larger than the sum of its proper divisors (9021497683).

20696376909 is a wasteful number, since it uses less digits than its factorization.

20696376909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530676347.

The product of its (nonzero) digits is 6613488, while the sum is 57.

The spelling of 20696376909 in words is "twenty billion, six hundred ninety-six million, three hundred seventy-six thousand, nine hundred nine".