20285342 has 32 divisors (see below), whose sum is σ = 38223360. Its totient is φ = 7843680.

The previous prime is 20285327. The next prime is 20285347. The reversal of 20285342 is 24358202.

It is a super-2 number, since 2×20285342² = 822990200113928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23759 + ... + 24597.

It is an arithmetic number, because the mean of its divisors is an integer number (1194480).

Almost surely, 2^20285342 is an apocalyptic number.

20285342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20285342 is a deficient number, since it is larger than the sum of its proper divisors (17938018).

20285342 is a wasteful number, since it uses less digits than its factorization.

20285342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20285342 is about 4503.9251769984. The cubic root of 20285342 is about 272.7265663349.

The spelling of 20285342 in words is "twenty million, two hundred eighty-five thousand, three hundred forty-two".