20406964517 has 8 divisors (see below), whose sum is σ = 20443914912. Its totient is φ = 20370042000.

The previous prime is 20406964511. The next prime is 20406964541. The reversal of 20406964517 is 71546960402.

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 20406964517 - 2⁸ = 20406964261 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 (20406964511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910642 + ... + 1921292.

It is an arithmetic number, because the mean of its divisors is an integer number (2555489364).

Almost surely, 2^20406964517 is an apocalyptic number.

It is an amenable number.

20406964517 is a deficient number, since it is larger than the sum of its proper divisors (36950395).

20406964517 is a wasteful number, since it uses less digits than its factorization.

20406964517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13939.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20406964517 in words is "twenty billion, four hundred six million, nine hundred sixty-four thousand, five hundred seventeen".