20542116 has 96 divisors (see below), whose sum is σ = 58885120. Its totient is φ = 5443200.

The previous prime is 20542099. The next prime is 20542153. The reversal of 20542116 is 61124502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20542092 and 20542101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97251 + ... + 97461.

Almost surely, 2^20542116 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 20542116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29442560).

20542116 is an abundant number, since it is smaller than the sum of its proper divisors (38343004).

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

20542116 is a wasteful number, since it uses less digits than its factorization.

20542116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20542116 is about 4532.3411169064. The cubic root of 20542116 is about 273.8724787103.

Adding to 20542116 its reverse (61124502), we get a palindrome (81666618).

The spelling of 20542116 in words is "twenty million, five hundred forty-two thousand, one hundred sixteen".