20153424 has 40 divisors (see below), whose sum is σ = 52924192. Its totient is φ = 6606720.

The previous prime is 20153423. The next prime is 20153429. The reversal of 20153424 is 42435102.

It is a self number, because there is not a number n which added to its sum of digits gives 20153424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514 + ... + 6369.

Almost surely, 2^20153424 is an apocalyptic number.

20153424 is a gapful number since it is divisible by the number (24) 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 20153424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26462096).

20153424 is an abundant number, since it is smaller than the sum of its proper divisors (32770768).

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

20153424 is a wasteful number, since it uses less digits than its factorization.

20153424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955 (or 6949 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20153424 is about 4489.2565085992. The cubic root of 20153424 is about 272.1340890193.

Adding to 20153424 its reverse (42435102), we get a palindrome (62588526).

The spelling of 20153424 in words is "twenty million, one hundred fifty-three thousand, four hundred twenty-four".