20320443402 has 64 divisors (see below), whose sum is σ = 46957086720. Its totient is φ = 5742225216.

The previous prime is 20320443391. The next prime is 20320443413. The reversal of 20320443402 is 20434402302.

It is an interprime number because it is at equal distance from previous prime (20320443391) and next prime (20320443413).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3039099 + ... + 3045777.

It is an arithmetic number, because the mean of its divisors is an integer number (733704480).

Almost surely, 2^20320443402 is an apocalyptic number.

20320443402 is an abundant number, since it is smaller than the sum of its proper divisors (26636643318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20320443402 is a wasteful number, since it uses less digits than its factorization.

20320443402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7475.

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20320443402 its reverse (20434402302), we get a palindrome (40754845704).

The spelling of 20320443402 in words is "twenty billion, three hundred twenty million, four hundred forty-three thousand, four hundred two".