20135424 has 40 divisors (see below), whose sum is σ = 53646120. Its totient is φ = 6711296.

The previous prime is 20135377. The next prime is 20135431. The reversal of 20135424 is 42453102.

It is a super-4 number, since 4×20135424⁴ (a number of 30 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20135424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5019 + ... + 8090.

It is an arithmetic number, because the mean of its divisors is an integer number (1341153).

Almost surely, 2^20135424 is an apocalyptic number.

20135424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20135424 is an abundant number, since it is smaller than the sum of its proper divisors (33510696).

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

20135424 is an equidigital number, since it uses as much as digits as its factorization.

20135424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13130 (or 13114 counting only the distinct ones).

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

The square root of 20135424 is about 4487.2512744441. The cubic root of 20135424 is about 272.0530461708.

Adding to 20135424 its reverse (42453102), we get a palindrome (62588526).

The spelling of 20135424 in words is "twenty million, one hundred thirty-five thousand, four hundred twenty-four".