20406056545 has 8 divisors (see below), whose sum is σ = 27985449024. Its totient is φ = 13992724464.

The previous prime is 20406056507. The next prime is 20406056551. The reversal of 20406056545 is 54565060402.

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 20406056545 - 2¹¹ = 20406054497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291515059 + ... + 291515128.

It is an arithmetic number, because the mean of its divisors is an integer number (3498181128).

Almost surely, 2^20406056545 is an apocalyptic number.

It is an amenable number.

20406056545 is a deficient number, since it is larger than the sum of its proper divisors (7579392479).

20406056545 is an equidigital number, since it uses as much as digits as its factorization.

20406056545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583030199.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 20406056545 in words is "twenty billion, four hundred six million, fifty-six thousand, five hundred forty-five".