20584880345 has 8 divisors (see below), whose sum is σ = 26001954240. Its totient is φ = 15601172400.

The previous prime is 20584880293. The next prime is 20584880363. The reversal of 20584880345 is 54308848502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20584880345 - 2⁸ = 20584880089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20584880345.

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, 108341381 + ... + 108341570.

It is an arithmetic number, because the mean of its divisors is an integer number (3250244280).

Almost surely, 2^20584880345 is an apocalyptic number.

It is an amenable number.

20584880345 is a deficient number, since it is larger than the sum of its proper divisors (5417073895).

20584880345 is a wasteful number, since it uses less digits than its factorization.

20584880345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216682975.

The product of its (nonzero) digits is 1228800, while the sum is 47.

The spelling of 20584880345 in words is "twenty billion, five hundred eighty-four million, eight hundred eighty thousand, three hundred forty-five".