20327978 has 16 divisors (see below), whose sum is σ = 33829920. Its totient is φ = 9082800.

The previous prime is 20327969. The next prime is 20328013. The reversal of 20327978 is 87972302.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6533 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (2114370).

Almost surely, 2^20327978 is an apocalyptic number.

20327978 is a deficient number, since it is larger than the sum of its proper divisors (13501942).

20327978 is a wasteful number, since it uses less digits than its factorization.

20327978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15733.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 20327978 is about 4508.6558972714. The cubic root of 20327978 is about 272.9175060583.

The spelling of 20327978 in words is "twenty million, three hundred twenty-seven thousand, nine hundred seventy-eight".