20858732305 has 8 divisors (see below), whose sum is σ = 25563042432. Its totient is φ = 16331943408.

The previous prime is 20858732281. The next prime is 20858732309. The reversal of 20858732305 is 50323785802.

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 20858732305 - 2²¹ = 20856635153 is a prime.

It is a super-2 number, since 2×20858732305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20858732309) 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, 44380047 + ... + 44380516.

It is an arithmetic number, because the mean of its divisors is an integer number (3195380304).

Almost surely, 2^20858732305 is an apocalyptic number.

It is an amenable number.

20858732305 is a deficient number, since it is larger than the sum of its proper divisors (4704310127).

20858732305 is an equidigital number, since it uses as much as digits as its factorization.

20858732305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88760615.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 20858732305 in words is "twenty billion, eight hundred fifty-eight million, seven hundred thirty-two thousand, three hundred five".