20000155433 has 2 divisors, whose sum is σ = 20000155434. Its totient is φ = 20000155432.

The previous prime is 20000155423. The next prime is 20000155451. The reversal of 20000155433 is 33455100002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10512811024 + 9487344409 = 102532^2 + 97403^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000155433 - 2⁶ = 20000155369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000155399 and 20000155408.

It is not a weakly prime, because it can be changed into another prime (20000155423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000077716 + 10000077717.

It is an arithmetic number, because the mean of its divisors is an integer number (10000077717).

Almost surely, 2^20000155433 is an apocalyptic number.

It is an amenable number.

20000155433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000155433 is an equidigital number, since it uses as much as digits as its factorization.

20000155433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 20000155433 its reverse (33455100002), we get a palindrome (53455255435).

The spelling of 20000155433 in words is "twenty billion, one hundred fifty-five thousand, four hundred thirty-three".