20700066505 has 8 divisors (see below), whose sum is σ = 24847200000. Its totient is φ = 16555306416.

The previous prime is 20700066479. The next prime is 20700066557. The reversal of 20700066505 is 50566000702.

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 20700066505 - 2⁹ = 20700065993 is a prime.

It is a super-2 number, since 2×20700066505² (a number of 21 digits) contains 22 as substring.

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, 574105 + ... + 609094.

It is an arithmetic number, because the mean of its divisors is an integer number (3105900000).

Almost surely, 2^20700066505 is an apocalyptic number.

It is an amenable number.

20700066505 is a deficient number, since it is larger than the sum of its proper divisors (4147133495).

20700066505 is a wasteful number, since it uses less digits than its factorization.

20700066505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186703.

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 20700066505 in words is "twenty billion, seven hundred million, sixty-six thousand, five hundred five".