20724795658 has 8 divisors (see below), whose sum is σ = 35528221152. Its totient is φ = 8882055276.

The previous prime is 20724795649. The next prime is 20724795671. The reversal of 20724795658 is 85659742702.

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

It is a junction number, because it is equal to n+sod(n) for n = 20724795599 and 20724795608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740171260 + ... + 740171287.

It is an arithmetic number, because the mean of its divisors is an integer number (4441027644).

Almost surely, 2^20724795658 is an apocalyptic number.

20724795658 is a deficient number, since it is larger than the sum of its proper divisors (14803425494).

20724795658 is a wasteful number, since it uses less digits than its factorization.

20724795658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480342556.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 20724795658 in words is "twenty billion, seven hundred twenty-four million, seven hundred ninety-five thousand, six hundred fifty-eight".