20135472 has 80 divisors (see below), whose sum is σ = 60710400. Its totient is φ = 5748288.

The previous prime is 20135447. The next prime is 20135501. The reversal of 20135472 is 27453102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15853 + ... + 17075.

It is an arithmetic number, because the mean of its divisors is an integer number (758880).

Almost surely, 2^20135472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20135472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30355200).

20135472 is an abundant number, since it is smaller than the sum of its proper divisors (40574928).

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

20135472 is a wasteful number, since it uses less digits than its factorization.

20135472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20135472 is about 4487.2566229268. The cubic root of 20135472 is about 272.0532623493.

Adding to 20135472 its reverse (27453102), we get a palindrome (47588574).

The spelling of 20135472 in words is "twenty million, one hundred thirty-five thousand, four hundred seventy-two".