20161448667 has 8 divisors (see below), whose sum is σ = 29868812880. Its totient is φ = 13440965760.

The previous prime is 20161448633. The next prime is 20161448687. The reversal of 20161448667 is 76684416102.

20161448667 is a `hidden beast` number, since 2 + 0 + 161 + 4 + 486 + 6 + 7 = 666.

It is not a de Polignac number, because 20161448667 - 2⁷ = 20161448539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20161448687) 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, 373360134 + ... + 373360187.

It is an arithmetic number, because the mean of its divisors is an integer number (3733601610).

Almost surely, 2^20161448667 is an apocalyptic number.

20161448667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20161448667 is a deficient number, since it is larger than the sum of its proper divisors (9707364213).

20161448667 is an equidigital number, since it uses as much as digits as its factorization.

20161448667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746720330 (or 746720324 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20161448667 in words is "twenty billion, one hundred sixty-one million, four hundred forty-eight thousand, six hundred sixty-seven".