20476665813 has 8 divisors (see below), whose sum is σ = 27308275488. Its totient is φ = 13648083344.

The previous prime is 20476665743. The next prime is 20476665851. The reversal of 20476665813 is 31856667402.

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 20476665813 - 2³³ = 11886731221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20476665613) 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, 740970 + ... + 768107.

It is an arithmetic number, because the mean of its divisors is an integer number (3413534436).

Almost surely, 2^20476665813 is an apocalyptic number.

It is an amenable number.

20476665813 is a deficient number, since it is larger than the sum of its proper divisors (6831609675).

20476665813 is a wasteful number, since it uses less digits than its factorization.

20476665813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513603.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 20476665813 in words is "twenty billion, four hundred seventy-six million, six hundred sixty-five thousand, eight hundred thirteen".