20017452 has 96 divisors (see below), whose sum is σ = 60060672. Its totient is φ = 5043456.

The previous prime is 20017451. The next prime is 20017457. The reversal of 20017452 is 25471002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20017451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24718 + ... + 25514.

It is an arithmetic number, because the mean of its divisors is an integer number (625632).

Almost surely, 2^20017452 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 20017452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30030336).

20017452 is an abundant number, since it is smaller than the sum of its proper divisors (40043220).

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

20017452 is a wasteful number, since it uses less digits than its factorization.

20017452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20017452 is about 4474.0867224496. The cubic root of 20017452 is about 271.5206920661.

Adding to 20017452 its reverse (25471002), we get a palindrome (45488454).

It can be divided in two parts, 2001 and 7452, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 20017452 in words is "twenty million, seventeen thousand, four hundred fifty-two".