20000643541 has 8 divisors (see below), whose sum is σ = 20089944000. Its totient is φ = 19911530400.

The previous prime is 20000643511. The next prime is 20000643601. The reversal of 20000643541 is 14534600002.

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-20000643541 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 (20000643511) 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, 169410 + ... + 262108.

It is an arithmetic number, because the mean of its divisors is an integer number (2511243000).

Almost surely, 2^20000643541 is an apocalyptic number.

It is an amenable number.

20000643541 is a deficient number, since it is larger than the sum of its proper divisors (89300459).

20000643541 is an equidigital number, since it uses as much as digits as its factorization.

20000643541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93659.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 20000643541 in words is "twenty billion, six hundred forty-three thousand, five hundred forty-one".