20617628675 has 24 divisors (see below), whose sum is σ = 29234605056. Its totient is φ = 14129828640.

The previous prime is 20617628671. The next prime is 20617628687. The reversal of 20617628675 is 57682671602.

It is not a de Polignac number, because 20617628675 - 2² = 20617628671 is a prime.

It is a super-2 number, since 2×20617628675² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20617628671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286712 + ... + 351338.

It is an arithmetic number, because the mean of its divisors is an integer number (1218108544).

Almost surely, 2^20617628675 is an apocalyptic number.

20617628675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20617628675 is a deficient number, since it is larger than the sum of its proper divisors (8616976381).

20617628675 is a wasteful number, since it uses less digits than its factorization.

20617628675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66467 (or 66462 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 20617628675 in words is "twenty billion, six hundred seventeen million, six hundred twenty-eight thousand, six hundred seventy-five".