20553468 has 48 divisors (see below), whose sum is σ = 51932160. Its totient is φ = 6289344.

The previous prime is 20553461. The next prime is 20553469. The reversal of 20553468 is 86435502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553461) 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, 55821 + ... + 56187.

It is an arithmetic number, because the mean of its divisors is an integer number (1081920).

Almost surely, 2^20553468 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 20553468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25966080).

20553468 is an abundant number, since it is smaller than the sum of its proper divisors (31378692).

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

20553468 is a wasteful number, since it uses less digits than its factorization.

20553468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 20553468 is about 4533.5932768611. The cubic root of 20553468 is about 273.9229186270.

The spelling of 20553468 in words is "twenty million, five hundred fifty-three thousand, four hundred sixty-eight".