20768178 has 16 divisors (see below), whose sum is σ = 43722720. Its totient is φ = 6558336.

The previous prime is 20768173. The next prime is 20768179. The reversal of 20768178 is 87186702.

It is not an unprimeable number, because it can be changed into a prime (20768173) 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, 90975 + ... + 91202.

It is an arithmetic number, because the mean of its divisors is an integer number (2732670).

Almost surely, 2^20768178 is an apocalyptic number.

20768178 is an abundant number, since it is smaller than the sum of its proper divisors (22954542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20768178 is a wasteful number, since it uses less digits than its factorization.

20768178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182201.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 20768178 is about 4557.2116474880. The cubic root of 20768178 is about 274.8734536220.

The spelling of 20768178 in words is "twenty million, seven hundred sixty-eight thousand, one hundred seventy-eight".