20081278 has 32 divisors (see below), whose sum is σ = 35697600. Its totient is φ = 8467200.

The previous prime is 20081263. The next prime is 20081291. The reversal of 20081278 is 87218002.

It is a super-2 number, since 2×20081278² = 806515452226568, 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 15 ways as a sum of consecutive naturals, for example, 49878 + ... + 50278.

It is an arithmetic number, because the mean of its divisors is an integer number (1115550).

Almost surely, 2^20081278 is an apocalyptic number.

20081278 is a deficient number, since it is larger than the sum of its proper divisors (15616322).

20081278 is an equidigital number, since it uses as much as digits as its factorization.

20081278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 20081278 is about 4481.2138980415. The cubic root of 20081278 is about 271.8089687353.

The spelling of 20081278 in words is "twenty million, eighty-one thousand, two hundred seventy-eight".