20401021433 has 8 divisors (see below), whose sum is σ = 21971565000. Its totient is φ = 18830654208.

The previous prime is 20401021427. The next prime is 20401021453. The reversal of 20401021433 is 33412010402.

It can be written as a sum of positive squares in 4 ways, for example, as 1411354624 + 18989666809 = 37568^2 + 137803^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20401021433 - 2¹² = 20401017337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401021453) 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, 290033 + ... + 353441.

It is an arithmetic number, because the mean of its divisors is an integer number (2746445625).

Almost surely, 2^20401021433 is an apocalyptic number.

It is an amenable number.

20401021433 is a deficient number, since it is larger than the sum of its proper divisors (1570543567).

20401021433 is a wasteful number, since it uses less digits than its factorization.

20401021433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88171.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20401021433 its reverse (33412010402), we get a palindrome (53813031835).

The spelling of 20401021433 in words is "twenty billion, four hundred one million, twenty-one thousand, four hundred thirty-three".