20046720 has 128 divisors (see below), whose sum is σ = 65435040. Its totient is φ = 5218304.

The previous prime is 20046707. The next prime is 20046727. The reversal of 20046720 is 2764002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20046727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101662 + ... + 101858.

Almost surely, 2^20046720 is an apocalyptic number.

20046720 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 20046720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32717520).

20046720 is an abundant number, since it is smaller than the sum of its proper divisors (45388320).

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

20046720 is a wasteful number, since it uses less digits than its factorization.

20046720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20046720 is about 4477.3563628552. The cubic root of 20046720 is about 271.6529599434.

The spelling of 20046720 in words is "twenty million, forty-six thousand, seven hundred twenty".