20320264406 has 16 divisors (see below), whose sum is σ = 32889553200. Its totient is φ = 9360151968.

The previous prime is 20320264387. The next prime is 20320264409. The reversal of 20320264406 is 60446202302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320264409) 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, 754496 + ... + 780963.

It is an arithmetic number, because the mean of its divisors is an integer number (2055597075).

Almost surely, 2^20320264406 is an apocalyptic number.

20320264406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20320264406 is a deficient number, since it is larger than the sum of its proper divisors (12569288794).

20320264406 is a wasteful number, since it uses less digits than its factorization.

20320264406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535983.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20320264406 its reverse (60446202302), we get a palindrome (80766466708).

The spelling of 20320264406 in words is "twenty billion, three hundred twenty million, two hundred sixty-four thousand, four hundred six".