20016000 has 192 divisors, whose sum is σ = 72399600. Its totient is φ = 5299200.

The previous prime is 20015981. The next prime is 20016013. The reversal of 20016000 is 61002.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143931 + ... + 144069.

Almost surely, 2^20016000 is an apocalyptic number.

20016000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20016000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36199800).

20016000 is an abundant number, since it is smaller than the sum of its proper divisors (52383600).

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

20016000 is a wasteful number, since it uses less digits than its factorization.

20016000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20016000 is about 4473.9244517537. The cubic root of 20016000 is about 271.5141268353.

Adding to 20016000 its reverse (61002), we get a palindrome (20077002).

It can be divided in two parts, 2001 and 6000, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 20016000 in words is "twenty million, sixteen thousand".