20452554 has 32 divisors (see below), whose sum is σ = 46136640. Its totient is φ = 6714576.

The previous prime is 20452519. The next prime is 20452559. The reversal of 20452554 is 45525402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20452559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (1441770).

Almost surely, 2^20452554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20452554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23068320).

20452554 is an abundant number, since it is smaller than the sum of its proper divisors (25684086).

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

20452554 is a wasteful number, since it uses less digits than its factorization.

20452554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731 (or 5725 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 20452554 is about 4522.4499997236. The cubic root of 20452554 is about 273.4738780814.

Adding to 20452554 its reverse (45525402), we get a palindrome (65977956).

The spelling of 20452554 in words is "twenty million, four hundred fifty-two thousand, five hundred fifty-four".