20429888 has 28 divisors (see below), whose sum is σ = 42306240. Its totient is φ = 9770112.

The previous prime is 20429881. The next prime is 20429909. The reversal of 20429888 is 88892402.

It is not an unprimeable number, because it can be changed into a prime (20429881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5468 + ... + 8411.

Almost surely, 2^20429888 is an apocalyptic number.

It is an amenable number.

20429888 is an abundant number, since it is smaller than the sum of its proper divisors (21876352).

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

20429888 is a wasteful number, since it uses less digits than its factorization.

20429888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13914 (or 13904 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 20429888 is about 4519.9433624770. The cubic root of 20429888 is about 273.3728173512.

The spelling of 20429888 in words is "twenty million, four hundred twenty-nine thousand, eight hundred eighty-eight".