20429568 has 54 divisors (see below), whose sum is σ = 58910124. Its totient is φ = 6809088.

The previous prime is 20429557. The next prime is 20429569. The reversal of 20429568 is 86592402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20429569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2130 + ... + 6737.

Almost surely, 2^20429568 is an apocalyptic number.

It is an amenable number.

20429568 is an abundant number, since it is smaller than the sum of its proper divisors (38480556).

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

20429568 is an equidigital number, since it uses as much as digits as its factorization.

20429568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889 (or 8872 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20429568 is about 4519.9079636647. The cubic root of 20429568 is about 273.3713900345.

The spelling of 20429568 in words is "twenty million, four hundred twenty-nine thousand, five hundred sixty-eight".