20678380 has 24 divisors (see below), whose sum is σ = 45313632. Its totient is φ = 7911552.

The previous prime is 20678353. The next prime is 20678381. The reversal of 20678380 is 8387602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20678381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22017 + ... + 22936.

It is an arithmetic number, because the mean of its divisors is an integer number (1888068).

Almost surely, 2^20678380 is an apocalyptic number.

20678380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20678380 is an abundant number, since it is smaller than the sum of its proper divisors (24635252).

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

20678380 is a wasteful number, since it uses less digits than its factorization.

20678380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44985 (or 44983 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20678380 is about 4547.3486780761. The cubic root of 20678380 is about 274.4767128772.

The spelling of 20678380 in words is "twenty million, six hundred seventy-eight thousand, three hundred eighty".