20029240 has 96 divisors (see below), whose sum is σ = 57250800. Its totient is φ = 6236160.

The previous prime is 20029199. The next prime is 20029241. The reversal of 20029240 is 4292002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20029241) by changing a digit.

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, 21096 + ... + 22024.

Almost surely, 2^20029240 is an apocalyptic number.

20029240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20029240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28625400).

20029240 is an abundant number, since it is smaller than the sum of its proper divisors (37221560).

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

20029240 is a wasteful number, since it uses less digits than its factorization.

20029240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20029240 is about 4475.4038923878. The cubic root of 20029240 is about 271.5739798646.

The spelling of 20029240 in words is "twenty million, twenty-nine thousand, two hundred forty".