20476923909 has 16 divisors (see below), whose sum is σ = 29816889984. Its totient is φ = 12423700800.

The previous prime is 20476923893. The next prime is 20476923959. The reversal of 20476923909 is 90932967402.

It is not a de Polignac number, because 20476923909 - 2⁴ = 20476923893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20476923959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3694762 + ... + 3700299.

It is an arithmetic number, because the mean of its divisors is an integer number (1863555624).

Almost surely, 2^20476923909 is an apocalyptic number.

It is an amenable number.

20476923909 is a deficient number, since it is larger than the sum of its proper divisors (9339966075).

20476923909 is a wasteful number, since it uses less digits than its factorization.

20476923909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7395148.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 20476923909 in words is "twenty billion, four hundred seventy-six million, nine hundred twenty-three thousand, nine hundred nine".