20128407094 has 4 divisors (see below), whose sum is σ = 30192610644. Its totient is φ = 10064203546.

The previous prime is 20128407083. The next prime is 20128407097. The reversal of 20128407094 is 49070482102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20128407097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032101772 + ... + 5032101775.

It is an arithmetic number, because the mean of its divisors is an integer number (7548152661).

Almost surely, 2^20128407094 is an apocalyptic number.

20128407094 is a deficient number, since it is larger than the sum of its proper divisors (10064203550).

20128407094 is a wasteful number, since it uses less digits than its factorization.

20128407094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10064203549.

The product of its (nonzero) digits is 32256, while the sum is 37.

Adding to 20128407094 its reverse (49070482102), we get a palindrome (69198889196).

The spelling of 20128407094 in words is "twenty billion, one hundred twenty-eight million, four hundred seven thousand, ninety-four".