20278132 has 12 divisors (see below), whose sum is σ = 40556320. Its totient is φ = 8690616.

The previous prime is 20278129. The next prime is 20278147. The reversal of 20278132 is 23187202.

20278132 is an admirable number.

It is a super-2 number, since 2×20278132² = 822405274818848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20278097 and 20278106.

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, 362082 + ... + 362137.

Almost surely, 2^20278132 is an apocalyptic number.

It is an amenable number.

20278132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20278132 is a wasteful number, since it uses less digits than its factorization.

20278132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724230 (or 724228 counting only the distinct ones).

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

The square root of 20278132 is about 4503.1246929216. The cubic root of 20278132 is about 272.6942508571.

The spelling of 20278132 in words is "twenty million, two hundred seventy-eight thousand, one hundred thirty-two".