20542392 has 96 divisors (see below), whose sum is σ = 63488880. Its totient is φ = 5944320.

The previous prime is 20542387. The next prime is 20542397. The reversal of 20542392 is 29324502.

It is an interprime number because it is at equal distance from previous prime (20542387) and next prime (20542397).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15267 + ... + 16557.

Almost surely, 2^20542392 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 20542392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31744440).

20542392 is an abundant number, since it is smaller than the sum of its proper divisors (42946488).

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

20542392 is a wasteful number, since it uses less digits than its factorization.

20542392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20542392 is about 4532.3715646447. The cubic root of 20542392 is about 273.8737052712.

Adding to 20542392 its reverse (29324502), we get a palindrome (49866894).

The spelling of 20542392 in words is "twenty million, five hundred forty-two thousand, three hundred ninety-two".