20642533140641 has 8 divisors (see below), whose sum is σ = 20725981411968. Its totient is φ = 20559094450000.

The previous prime is 20642533140571. The next prime is 20642533140659. The reversal of 20642533140641 is 14604133524602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20642533140641 is a prime.

It is a super-2 number, since 2×20642533140641² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20642533148641) 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, 1938551 + ... + 6711411.

It is an arithmetic number, because the mean of its divisors is an integer number (2590747676496).

Almost surely, 2^{20642533140641} is an apocalyptic number.

It is an amenable number.

20642533140641 is a deficient number, since it is larger than the sum of its proper divisors (83448271327).

20642533140641 is a wasteful number, since it uses less digits than its factorization.

20642533140641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790343.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20642533140641 in words is "twenty trillion, six hundred forty-two billion, five hundred thirty-three million, one hundred forty thousand, six hundred forty-one".