20620704 has 144 divisors (see below), whose sum is σ = 61979904. Its totient is φ = 5990400.

The previous prime is 20620687. The next prime is 20620709. The reversal of 20620704 is 40702602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20620709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502924 + ... + 502964.

It is an arithmetic number, because the mean of its divisors is an integer number (430416).

Almost surely, 2^20620704 is an apocalyptic number.

20620704 is a gapful number since it is divisible by the number (24) 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 20620704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30989952).

20620704 is an abundant number, since it is smaller than the sum of its proper divisors (41359200).

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

20620704 is a wasteful number, since it uses less digits than its factorization.

20620704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 90 counting only the distinct ones).

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

The square root of 20620704 is about 4541.0025324811. The cubic root of 20620704 is about 274.2212857104.

It can be divided in two parts, 206 and 20704, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20620704 in words is "twenty million, six hundred twenty thousand, seven hundred four".