20720433801 has 4 divisors (see below), whose sum is σ = 27627245072. Its totient is φ = 13813622532.

The previous prime is 20720433763. The next prime is 20720433809. The reversal of 20720433801 is 10833402702.

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.

It is not a de Polignac number, because 20720433801 - 2⁶ = 20720433737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20720433809) 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, 3453405631 + ... + 3453405636.

It is an arithmetic number, because the mean of its divisors is an integer number (6906811268).

Almost surely, 2^20720433801 is an apocalyptic number.

It is an amenable number.

20720433801 is a deficient number, since it is larger than the sum of its proper divisors (6906811271).

20720433801 is an equidigital number, since it uses as much as digits as its factorization.

20720433801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906811270.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 20720433801 in words is "twenty billion, seven hundred twenty million, four hundred thirty-three thousand, eight hundred one".