20433037384721 has 8 divisors (see below), whose sum is σ = 22541512162344. Its totient is φ = 18401234417280.

The previous prime is 20433037384709. The next prime is 20433037384723. The reversal of 20433037384721 is 12748373033402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1575687709696 + 18857349675025 = 1255264^2 + 4342505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20433037384721 - 2⁴² = 16034990873617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20433037384723) 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, 19167951986 + ... + 19167953051.

It is an arithmetic number, because the mean of its divisors is an integer number (2817689020293).

Almost surely, 2^{20433037384721} is an apocalyptic number.

It is an amenable number.

20433037384721 is a deficient number, since it is larger than the sum of its proper divisors (2108474777623).

20433037384721 is a wasteful number, since it uses less digits than its factorization.

20433037384721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38335905091.

The product of its (nonzero) digits is 2032128, while the sum is 47.

The spelling of 20433037384721 in words is "twenty trillion, four hundred thirty-three billion, thirty-seven million, three hundred eighty-four thousand, seven hundred twenty-one".