20278130 has 16 divisors (see below), whose sum is σ = 38422080. Its totient is φ = 7684272.

The previous prime is 20278129. The next prime is 20278147. The reversal of 20278130 is 3187202.

It is a super-2 number, since 2×20278130² = 822405112593800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20278096 and 20278105.

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, 53174 + ... + 53553.

It is an arithmetic number, because the mean of its divisors is an integer number (2401380).

Almost surely, 2^20278130 is an apocalyptic number.

20278130 is a deficient number, since it is larger than the sum of its proper divisors (18143950).

20278130 is a wasteful number, since it uses less digits than its factorization.

20278130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106753.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20278130 is about 4503.1244708535. The cubic root of 20278130 is about 272.6942418920.

The spelling of 20278130 in words is "twenty million, two hundred seventy-eight thousand, one hundred thirty".