20179455577 has 8 divisors (see below), whose sum is σ = 20342285312. Its totient is φ = 20016687600.

The previous prime is 20179455551. The next prime is 20179455581. The reversal of 20179455577 is 77555497102.

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 20179455577 - 2⁷ = 20179455449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20179455547) 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, 822427 + ... + 846607.

It is an arithmetic number, because the mean of its divisors is an integer number (2542785664).

Almost surely, 2^20179455577 is an apocalyptic number.

It is an amenable number.

20179455577 is a deficient number, since it is larger than the sum of its proper divisors (162829735).

20179455577 is a wasteful number, since it uses less digits than its factorization.

20179455577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30879.

The product of its (nonzero) digits is 3087000, while the sum is 52.

The spelling of 20179455577 in words is "twenty billion, one hundred seventy-nine million, four hundred fifty-five thousand, five hundred seventy-seven".