20464090309 has 8 divisors (see below), whose sum is σ = 22090854240. Its totient is φ = 18844841136.

The previous prime is 20464090303. The next prime is 20464090331. The reversal of 20464090309 is 90309046402.

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

It is a cyclic number.

It is not a de Polignac number, because 20464090309 - 2¹⁹ = 20463566021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464090303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1873027 + ... + 1883920.

It is an arithmetic number, because the mean of its divisors is an integer number (2761356780).

Almost surely, 2^20464090309 is an apocalyptic number.

It is an amenable number.

20464090309 is a deficient number, since it is larger than the sum of its proper divisors (1626763931).

20464090309 is a wasteful number, since it uses less digits than its factorization.

20464090309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757379.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 20464090309 in words is "twenty billion, four hundred sixty-four million, ninety thousand, three hundred nine".