20172333061 has 2 divisors, whose sum is σ = 20172333062. Its totient is φ = 20172333060.

The previous prime is 20172333047. The next prime is 20172333073. The reversal of 20172333061 is 16033327102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17032860100 + 3139472961 = 130510^2 + 56031^2 .

It is a cyclic number.

It is not a de Polignac number, because 20172333061 - 2²¹ = 20170235909 is a prime.

It is a super-2 number, since 2×20172333061² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20172333001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10086166530 + 10086166531.

It is an arithmetic number, because the mean of its divisors is an integer number (10086166531).

Almost surely, 2^20172333061 is an apocalyptic number.

It is an amenable number.

20172333061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20172333061 is an equidigital number, since it uses as much as digits as its factorization.

20172333061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The spelling of 20172333061 in words is "twenty billion, one hundred seventy-two million, three hundred thirty-three thousand, sixty-one".