20427292 has 6 divisors (see below), whose sum is σ = 35747768. Its totient is φ = 10213644.

The previous prime is 20427287. The next prime is 20427311. The reversal of 20427292 is 29272402.

It is a self number, because there is not a number n which added to its sum of digits gives 20427292.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553408 + ... + 2553415.

Almost surely, 2^20427292 is an apocalyptic number.

It is an amenable number.

20427292 is a deficient number, since it is larger than the sum of its proper divisors (15320476).

20427292 is a wasteful number, since it uses less digits than its factorization.

20427292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106827 (or 5106825 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20427292 is about 4519.6561816138. The cubic root of 20427292 is about 273.3612378148.

Adding to 20427292 its reverse (29272402), we get a palindrome (49699694).

The spelling of 20427292 in words is "twenty million, four hundred twenty-seven thousand, two hundred ninety-two".