20012642 has 12 divisors (see below), whose sum is σ = 32506290. Its totient is φ = 9236448.

The previous prime is 20012609. The next prime is 20012683. The reversal of 20012642 is 24621002.

It can be written as a sum of positive squares in 3 ways, for example, as 10764961 + 9247681 = 3281^2 + 3041^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20012642.

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, 29267 + ... + 29942.

Almost surely, 2^20012642 is an apocalyptic number.

20012642 is a deficient number, since it is larger than the sum of its proper divisors (12493648).

20012642 is a wasteful number, since it uses less digits than its factorization.

20012642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59237 (or 59224 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20012642 is about 4473.5491502833. The cubic root of 20012642 is about 271.4989423924.

Adding to 20012642 its reverse (24621002), we get a palindrome (44633644).

The spelling of 20012642 in words is "twenty million, twelve thousand, six hundred forty-two".