20542496 has 96 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 8515584.

The previous prime is 20542471. The next prime is 20542499. The reversal of 20542496 is 69424502.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (20542499) 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, 181736 + ... + 181848.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^20542496 is an apocalyptic number.

20542496 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20542496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24131520).

20542496 is an abundant number, since it is smaller than the sum of its proper divisors (27720544).

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

20542496 is a wasteful number, since it uses less digits than its factorization.

20542496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20542496 is about 4532.3830376525. The cubic root of 20542496 is about 273.8741674507.

Adding to 20542496 its reverse (69424502), we get a palindrome (89966998).

The spelling of 20542496 in words is "twenty million, five hundred forty-two thousand, four hundred ninety-six".