20612120071 has 8 divisors (see below), whose sum is σ = 20808341840. Its totient is φ = 20416027968.

The previous prime is 20612120063. The next prime is 20612120077. The reversal of 20612120071 is 17002121602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20612120071 - 2³ = 20612120063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612120077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303475 + ... + 365131.

It is an arithmetic number, because the mean of its divisors is an integer number (2601042730).

Almost surely, 2^20612120071 is an apocalyptic number.

20612120071 is a deficient number, since it is larger than the sum of its proper divisors (196221769).

20612120071 is a wasteful number, since it uses less digits than its factorization.

20612120071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64833.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 20612120071 its reverse (17002121602), we get a palindrome (37614241673).

The spelling of 20612120071 in words is "twenty billion, six hundred twelve million, one hundred twenty thousand, seventy-one".