20277166671 has 20 divisors (see below), whose sum is σ = 30393998712. Its totient is φ = 13471958448.

The previous prime is 20277166667. The next prime is 20277166673. The reversal of 20277166671 is 17666177202.

It is not a de Polignac number, because 20277166671 - 2² = 20277166667 is a prime.

It is a super-2 number, since 2×20277166671² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20277166673) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 403461 + ... + 450926.

Almost surely, 2^20277166671 is an apocalyptic number.

20277166671 is a deficient number, since it is larger than the sum of its proper divisors (10116832041).

20277166671 is an equidigital number, since it uses as much as digits as its factorization.

20277166671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854692 (or 854683 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 20277166671 in words is "twenty billion, two hundred seventy-seven million, one hundred sixty-six thousand, six hundred seventy-one".