20425542 has 16 divisors (see below), whose sum is σ = 41720832. Its totient is φ = 6663560.

The previous prime is 20425523. The next prime is 20425549. The reversal of 20425542 is 24552402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425549) 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, 35934 + ... + 36497.

It is an arithmetic number, because the mean of its divisors is an integer number (2607552).

Almost surely, 2^20425542 is an apocalyptic number.

20425542 is an abundant number, since it is smaller than the sum of its proper divisors (21295290).

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

20425542 is a wasteful number, since it uses less digits than its factorization.

20425542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72483.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20425542 is about 4519.4625786702. The cubic root of 20425542 is about 273.3534313333.

Adding to 20425542 its reverse (24552402), we get a palindrome (44977944).

The spelling of 20425542 in words is "twenty million, four hundred twenty-five thousand, five hundred forty-two".