20469570 has 48 divisors (see below), whose sum is σ = 54008640. Its totient is φ = 4961440.

The previous prime is 20469551. The next prime is 20469571. The reversal of 20469570 is 7596402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20469571) 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, 811 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (1125180).

Almost surely, 2^20469570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20469570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27004320).

20469570 is an abundant number, since it is smaller than the sum of its proper divisors (33539070).

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

20469570 is a wasteful number, since it uses less digits than its factorization.

20469570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671 (or 5660 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20469570 is about 4524.3308897560. The cubic root of 20469570 is about 273.5496981411.

The spelling of 20469570 in words is "twenty million, four hundred sixty-nine thousand, five hundred seventy".