20727934658 has 8 divisors (see below), whose sum is σ = 32920837452. Its totient is φ = 9754322176.

The previous prime is 20727934657. The next prime is 20727934681. The reversal of 20727934658 is 85643972702.

It can be written as a sum of positive squares in 2 ways, for example, as 20369854729 + 358079929 = 142723^2 + 18923^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20727934657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304822535 + ... + 304822602.

Almost surely, 2^20727934658 is an apocalyptic number.

20727934658 is a deficient number, since it is larger than the sum of its proper divisors (12192902794).

20727934658 is a wasteful number, since it uses less digits than its factorization.

20727934658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609645156.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 20727934658 in words is "twenty billion, seven hundred twenty-seven million, nine hundred thirty-four thousand, six hundred fifty-eight".