180020477 has 16 divisors (see below), whose sum is σ = 222241152. Its totient is φ = 141998400.

The previous prime is 180020461. The next prime is 180020501. The reversal of 180020477 is 774020081.

It is a cyclic number.

It is not a de Polignac number, because 180020477 - 2⁴ = 180020461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180020447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28727 + ... + 34427.

It is an arithmetic number, because the mean of its divisors is an integer number (13890072).

Almost surely, 2^180020477 is an apocalyptic number.

It is an amenable number.

180020477 is a deficient number, since it is larger than the sum of its proper divisors (42220675).

180020477 is a wasteful number, since it uses less digits than its factorization.

180020477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6068.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 180020477 is about 13417.1709760292. The cubic root of 180020477 is about 564.6430271776.

The spelling of 180020477 in words is "one hundred eighty million, twenty thousand, four hundred seventy-seven".