20477104640501 has 8 divisors (see below), whose sum is σ = 21187569631800. Its totient is φ = 19766930178240.

The previous prime is 20477104640459. The next prime is 20477104640521. The reversal of 20477104640501 is 10504640177402.

It can be written as a sum of positive squares in 4 ways, for example, as 7812438665476 + 12664665975025 = 2795074^2 + 3558745^2 .

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 20477104640501 - 2⁶ = 20477104640437 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 (20477104640521) 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, 72488846 + ... + 72770783.

It is an arithmetic number, because the mean of its divisors is an integer number (2648446203975).

Almost surely, 2^{20477104640501} is an apocalyptic number.

It is an amenable number.

20477104640501 is a deficient number, since it is larger than the sum of its proper divisors (710464991299).

20477104640501 is a wasteful number, since it uses less digits than its factorization.

20477104640501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145264519.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 20477104640501 in words is "twenty trillion, four hundred seventy-seven billion, one hundred four million, six hundred forty thousand, five hundred one".