20429570 has 48 divisors (see below), whose sum is σ = 43202808. Its totient is φ = 6935040.

The previous prime is 20429569. The next prime is 20429593. The reversal of 20429570 is 7592402.

It can be written as a sum of positive squares in 4 ways, for example, as 20259001 + 170569 = 4501^2 + 413^2 .

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 84650 + ... + 84890.

Almost surely, 2^20429570 is an apocalyptic number.

20429570 is an abundant number, since it is smaller than the sum of its proper divisors (22773238).

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

20429570 is a wasteful number, since it uses less digits than its factorization.

20429570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20429570 is about 4519.9081849082. The cubic root of 20429570 is about 273.3713989553.

The spelling of 20429570 in words is "twenty million, four hundred twenty-nine thousand, five hundred seventy".