20542812 has 12 divisors (see below), whose sum is σ = 47933256. Its totient is φ = 6847600.

The previous prime is 20542811. The next prime is 20542813. The reversal of 20542812 is 21824502.

It is an interprime number because it is at equal distance from previous prime (20542811) and next prime (20542813).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855939 + ... + 855962.

It is an arithmetic number, because the mean of its divisors is an integer number (3994438).

Almost surely, 2^20542812 is an apocalyptic number.

It is an amenable number.

20542812 is an abundant number, since it is smaller than the sum of its proper divisors (27390444).

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

20542812 is a wasteful number, since it uses less digits than its factorization.

20542812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711908 (or 1711906 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20542812 is about 4532.4178977672. The cubic root of 20542812 is about 273.8755717557.

The spelling of 20542812 in words is "twenty million, five hundred forty-two thousand, eight hundred twelve".