20479742033 has 4 divisors (see below), whose sum is σ = 20480078448. Its totient is φ = 20479405620.

The previous prime is 20479742011. The next prime is 20479742051. The reversal of 20479742033 is 33024797402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33024797402 = 2 ⋅16512398701.

It is a cyclic number.

It is not a de Polignac number, because 20479742033 - 2¹² = 20479737937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20479742083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48491 + ... + 208112.

It is an arithmetic number, because the mean of its divisors is an integer number (5120019612).

Almost surely, 2^20479742033 is an apocalyptic number.

It is an amenable number.

20479742033 is a deficient number, since it is larger than the sum of its proper divisors (336415).

20479742033 is an equidigital number, since it uses as much as digits as its factorization.

20479742033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336414.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 20479742033 in words is "twenty billion, four hundred seventy-nine million, seven hundred forty-two thousand, thirty-three".