20570620 has 24 divisors (see below), whose sum is σ = 49369824. Its totient is φ = 7052736.

The previous prime is 20570609. The next prime is 20570647. The reversal of 20570620 is 2607502.

It is a junction number, because it is equal to n+sod(n) for n = 20570591 and 20570600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73327 + ... + 73606.

It is an arithmetic number, because the mean of its divisors is an integer number (2057076).

Almost surely, 2^20570620 is an apocalyptic number.

20570620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20570620 is an abundant number, since it is smaller than the sum of its proper divisors (28799204).

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

20570620 is a wasteful number, since it uses less digits than its factorization.

20570620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146949 (or 146947 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20570620 is about 4535.4845386133. The cubic root of 20570620 is about 273.9990942482. Note that the first 3 decimals are identical.

The spelling of 20570620 in words is "twenty million, five hundred seventy thousand, six hundred twenty".