20355061373657 has 8 divisors (see below), whose sum is σ = 20480457117120. Its totient is φ = 20229671948400.

The previous prime is 20355061373609. The next prime is 20355061373659. The reversal of 20355061373657 is 75637316055302.

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 20355061373657 - 2¹² = 20355061369561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20355061373599 and 20355061373608.

It is not an unprimeable number, because it can be changed into a prime (20355061373659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4966907 + ... + 8085807.

It is an arithmetic number, because the mean of its divisors is an integer number (2560057139640).

Almost surely, 2^{20355061373657} is an apocalyptic number.

It is an amenable number.

20355061373657 is a deficient number, since it is larger than the sum of its proper divisors (125395743463).

20355061373657 is a wasteful number, since it uses less digits than its factorization.

20355061373657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159103.

The product of its (nonzero) digits is 11907000, while the sum is 53.

The spelling of 20355061373657 in words is "twenty trillion, three hundred fifty-five billion, sixty-one million, three hundred seventy-three thousand, six hundred fifty-seven".