20278006 has 16 divisors (see below), whose sum is σ = 34999200. Its totient is φ = 8631360.

The previous prime is 20278003. The next prime is 20278021. The reversal of 20278006 is 60087202.

It is a super-2 number, since 2×20278006² = 822395054672072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20278001) 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, 2775 + ... + 6946.

It is an arithmetic number, because the mean of its divisors is an integer number (2187450).

Almost surely, 2^20278006 is an apocalyptic number.

20278006 is a deficient number, since it is larger than the sum of its proper divisors (14721194).

20278006 is a wasteful number, since it uses less digits than its factorization.

20278006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9879.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20278006 is about 4503.1107026144. The cubic root of 20278006 is about 272.6936860525.

The spelling of 20278006 in words is "twenty million, two hundred seventy-eight thousand, six".