20331000061 has 2 divisors, whose sum is σ = 20331000062. Its totient is φ = 20331000060.

The previous prime is 20331000031. The next prime is 20331000113. The reversal of 20331000061 is 16000013302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15854587225 + 4476412836 = 125915^2 + 66906^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331000061 - 2¹³ = 20330991869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20330999999 and 20331000044.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165500030 + 10165500031.

It is an arithmetic number, because the mean of its divisors is an integer number (10165500031).

Almost surely, 2^20331000061 is an apocalyptic number.

It is an amenable number.

20331000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331000061 is an equidigital number, since it uses as much as digits as its factorization.

20331000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20331000061 its reverse (16000013302), we get a palindrome (36331013363).

The spelling of 20331000061 in words is "twenty billion, three hundred thirty-one million, sixty-one", and thus it is an aban number.