20010108061 has 2 divisors, whose sum is σ = 20010108062. Its totient is φ = 20010108060.

The previous prime is 20010108049. The next prime is 20010108091. The reversal of 20010108061 is 16080101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16504283961 + 3505824100 = 128469^2 + 59210^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010108061 - 2⁵ = 20010108029 is a prime.

It is a super-2 number, since 2×20010108061² (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 (20010108011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005054030 + 10005054031.

It is an arithmetic number, because the mean of its divisors is an integer number (10005054031).

Almost surely, 2^20010108061 is an apocalyptic number.

It is an amenable number.

20010108061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010108061 is an equidigital number, since it uses as much as digits as its factorization.

20010108061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20010108061 its reverse (16080101002), we get a palindrome (36090209063).

The spelling of 20010108061 in words is "twenty billion, ten million, one hundred eight thousand, sixty-one".