20131000733 has 2 divisors, whose sum is σ = 20131000734. Its totient is φ = 20131000732.

The previous prime is 20131000657. The next prime is 20131000753. The reversal of 20131000733 is 33700013102.

It is a happy number.

It is an a-pointer prime, because the next prime (20131000753) can be obtained adding 20131000733 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19972190329 + 158810404 = 141323^2 + 12602^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131000733 - 2²² = 20126806429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131000753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065500366 + 10065500367.

It is an arithmetic number, because the mean of its divisors is an integer number (10065500367).

Almost surely, 2^20131000733 is an apocalyptic number.

It is an amenable number.

20131000733 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131000733 is an equidigital number, since it uses as much as digits as its factorization.

20131000733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 20.

Adding to 20131000733 its reverse (33700013102), we get a palindrome (53831013835).

The spelling of 20131000733 in words is "twenty billion, one hundred thirty-one million, seven hundred thirty-three", and thus it is an aban number.