20542528 has 56 divisors (see below), whose sum is σ = 43891200. Its totient is φ = 9504768.

The previous prime is 20542513. The next prime is 20542531. The reversal of 20542528 is 82524502.

It is a junction number, because it is equal to n+sod(n) for n = 20542496 and 20542505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85833 + ... + 86071.

Almost surely, 2^20542528 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 20542528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21945600).

20542528 is an abundant number, since it is smaller than the sum of its proper divisors (23348672).

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

20542528 is a wasteful number, since it uses less digits than its factorization.

20542528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 20542528 is about 4532.3865678029. The cubic root of 20542528 is about 273.8743096595.

The spelling of 20542528 in words is "twenty million, five hundred forty-two thousand, five hundred twenty-eight".