20007678 has 8 divisors (see below), whose sum is σ = 40015368. Its totient is φ = 6669224.

The previous prime is 20007671. The next prime is 20007683. The reversal of 20007678 is 87670002.

It is a sphenic number, since it is the product of 3 distinct primes.

20007678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667301 + ... + 1667312.

It is an arithmetic number, because the mean of its divisors is an integer number (5001921).

Almost surely, 2^20007678 is an apocalyptic number.

20007678 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.

20007678 is a wasteful number, since it uses less digits than its factorization.

20007678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334618.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 20007678 is about 4472.9942991245. The cubic root of 20007678 is about 271.4764927129.

The spelling of 20007678 in words is "twenty million, seven thousand, six hundred seventy-eight".