20675320 has 16 divisors (see below), whose sum is σ = 46519560. Its totient is φ = 8270112.

The previous prime is 20675309. The next prime is 20675351. The reversal of 20675320 is 2357602.

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, 258402 + ... + 258481.

Almost surely, 2^20675320 is an apocalyptic number.

20675320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20675320 is an abundant number, since it is smaller than the sum of its proper divisors (25844240).

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

20675320 is a wasteful number, since it uses less digits than its factorization.

20675320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516894 (or 516890 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20675320 is about 4547.0122058336. The cubic root of 20675320 is about 274.4631731291.

The spelling of 20675320 in words is "twenty million, six hundred seventy-five thousand, three hundred twenty".