20461664102156 has 6 divisors (see below), whose sum is σ = 35807912178780. Its totient is φ = 10230832051076.

The previous prime is 20461664102137. The next prime is 20461664102189. The reversal of 20461664102156 is 65120146616402.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2557708012766 + ... + 2557708012773.

It is an arithmetic number, because the mean of its divisors is an integer number (5967985363130).

Almost surely, 2^{20461664102156} is an apocalyptic number.

It is an amenable number.

20461664102156 is a deficient number, since it is larger than the sum of its proper divisors (15346248076624).

20461664102156 is a wasteful number, since it uses less digits than its factorization.

20461664102156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5115416025543 (or 5115416025541 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 20461664102156 in words is "twenty trillion, four hundred sixty-one billion, six hundred sixty-four million, one hundred two thousand, one hundred fifty-six".