20548992 has 64 divisors (see below), whose sum is σ = 55569600. Its totient is φ = 6726144.

The previous prime is 20548991. The next prime is 20548999. The reversal of 20548992 is 29984502.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20548992² = 844522144432128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20548992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20548991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22203 + ... + 23109.

It is an arithmetic number, because the mean of its divisors is an integer number (868275).

Almost surely, 2^20548992 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 20548992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27784800).

20548992 is an abundant number, since it is smaller than the sum of its proper divisors (35020608).

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

20548992 is an equidigital number, since it uses as much as digits as its factorization.

20548992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20548992 is about 4533.0996018177. The cubic root of 20548992 is about 273.9030328021.

The spelling of 20548992 in words is "twenty million, five hundred forty-eight thousand, nine hundred ninety-two".