20336377309 has 4 divisors (see below), whose sum is σ = 20358507040. Its totient is φ = 20314247580.

The previous prime is 20336377249. The next prime is 20336377319. The reversal of 20336377309 is 90377363302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90377363302 = 2 ⋅45188681651.

It is a cyclic number.

It is not a de Polignac number, because 20336377309 - 2¹⁵ = 20336344541 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 (20336377319) 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, 11063487 + ... + 11065324.

It is an arithmetic number, because the mean of its divisors is an integer number (5089626760).

Almost surely, 2^20336377309 is an apocalyptic number.

It is an amenable number.

20336377309 is a deficient number, since it is larger than the sum of its proper divisors (22129731).

20336377309 is an equidigital number, since it uses as much as digits as its factorization.

20336377309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22129730.

The product of its (nonzero) digits is 428652, while the sum is 43.

The spelling of 20336377309 in words is "twenty billion, three hundred thirty-six million, three hundred seventy-seven thousand, three hundred nine".