20542412 has 18 divisors (see below), whose sum is σ = 39515364. Its totient is φ = 9337240.

The previous prime is 20542399. The next prime is 20542447. The reversal of 20542412 is 21424502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20738 + ... + 21705.

It is an arithmetic number, because the mean of its divisors is an integer number (2195298).

Almost surely, 2^20542412 is an apocalyptic number.

20542412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20542412 is a deficient number, since it is larger than the sum of its proper divisors (18972952).

20542412 is a wasteful number, since it uses less digits than its factorization.

20542412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42469 (or 42456 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 20542412 is about 4532.3737709946. The cubic root of 20542412 is about 273.8737941520.

Adding to 20542412 its reverse (21424502), we get a palindrome (41966914).

The spelling of 20542412 in words is "twenty million, five hundred forty-two thousand, four hundred twelve".