20700328 has 16 divisors (see below), whose sum is σ = 42341760. Its totient is φ = 9409200.

The previous prime is 20700319. The next prime is 20700341. The reversal of 20700328 is 82300702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20700299 and 20700308.

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, 117528 + ... + 117703.

It is an arithmetic number, because the mean of its divisors is an integer number (2646360).

Almost surely, 2^20700328 is an apocalyptic number.

It is an amenable number.

20700328 is an abundant number, since it is smaller than the sum of its proper divisors (21641432).

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

20700328 is a wasteful number, since it uses less digits than its factorization.

20700328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235248 (or 235244 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20700328 is about 4549.7613124207. The cubic root of 20700328 is about 274.5737882572.

The spelling of 20700328 in words is "twenty million, seven hundred thousand, three hundred twenty-eight".