20532570 has 16 divisors (see below), whose sum is σ = 49278240. Its totient is φ = 5475344.

The previous prime is 20532569. The next prime is 20532613. The reversal of 20532570 is 7523502.

It is a self number, because there is not a number n which added to its sum of digits gives 20532570.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342180 + ... + 342239.

It is an arithmetic number, because the mean of its divisors is an integer number (3079890).

Almost surely, 2^20532570 is an apocalyptic number.

20532570 is an abundant number, since it is smaller than the sum of its proper divisors (28745670).

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

20532570 is a wasteful number, since it uses less digits than its factorization.

20532570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684429.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20532570 is about 4531.2878963933. The cubic root of 20532570 is about 273.8300489406.

The spelling of 20532570 in words is "twenty million, five hundred thirty-two thousand, five hundred seventy".