20278012 has 12 divisors (see below), whose sum is σ = 36156456. Its totient is φ = 9947600.

The previous prime is 20278003. The next prime is 20278021. The reversal of 20278012 is 21087202.

It is an interprime number because it is at equal distance from previous prime (20278003) and next prime (20278021).

It is a super-2 number, since 2×20278012² = 822395541344288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47614 + ... + 48037.

It is an arithmetic number, because the mean of its divisors is an integer number (3013038).

Almost surely, 2^20278012 is an apocalyptic number.

It is an amenable number.

20278012 is a deficient number, since it is larger than the sum of its proper divisors (15878444).

20278012 is a wasteful number, since it uses less digits than its factorization.

20278012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95708 (or 95706 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20278012 is about 4503.1113688205. Note that the first 3 decimals coincide. The cubic root of 20278012 is about 272.6937129480.

The spelling of 20278012 in words is "twenty million, two hundred seventy-eight thousand, twelve".