20085101077 has 16 divisors (see below), whose sum is σ = 21511224000. Its totient is φ = 18698511744.

The previous prime is 20085101059. The next prime is 20085101107. The reversal of 20085101077 is 77010158002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20085101077 - 2¹¹ = 20085099029 is a prime.

It is a super-2 number, since 2×20085101077² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085101177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239199 + ... + 312067.

It is an arithmetic number, because the mean of its divisors is an integer number (1344451500).

Almost surely, 2^20085101077 is an apocalyptic number.

It is an amenable number.

20085101077 is a deficient number, since it is larger than the sum of its proper divisors (1426122923).

20085101077 is a wasteful number, since it uses less digits than its factorization.

20085101077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73140.

The product of its (nonzero) digits is 3920, while the sum is 31.

Adding to 20085101077 its reverse (77010158002), we get a palindrome (97095259079).

The spelling of 20085101077 in words is "twenty billion, eighty-five million, one hundred one thousand, seventy-seven".