20054659 has 4 divisors (see below), whose sum is σ = 20207880. Its totient is φ = 19901440.

The previous prime is 20054651. The next prime is 20054669. The reversal of 20054659 is 95645002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95645002 = 2 ⋅47822501.

It is a cyclic number.

It is not a de Polignac number, because 20054659 - 2³ = 20054651 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20054659.

It is not an unprimeable number, because it can be changed into a prime (20054651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76414 + ... + 76675.

It is an arithmetic number, because the mean of its divisors is an integer number (5051970).

Almost surely, 2^20054659 is an apocalyptic number.

20054659 is a deficient number, since it is larger than the sum of its proper divisors (153221).

20054659 is a wasteful number, since it uses less digits than its factorization.

20054659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153220.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 20054659 is about 4478.2428473677. The cubic root of 20054659 is about 271.6888156548.

The spelling of 20054659 in words is "twenty million, fifty-four thousand, six hundred fifty-nine".