20689292 has 24 divisors (see below), whose sum is σ = 39732336. Its totient is φ = 9367488.

The previous prime is 20689247. The next prime is 20689313. The reversal of 20689292 is 29298602.

It is a super-2 number, since 2×20689292² = 856093606922528, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 998 + ... + 6509.

It is an arithmetic number, because the mean of its divisors is an integer number (1655514).

Almost surely, 2^20689292 is an apocalyptic number.

It is an amenable number.

20689292 is a deficient number, since it is larger than the sum of its proper divisors (19043044).

20689292 is a wasteful number, since it uses less digits than its factorization.

20689292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577 (or 7575 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 20689292 is about 4548.5483398553. The cubic root of 20689292 is about 274.5249849245.

It can be divided in two parts, 206 and 89292, that added together give a palindrome (89498).

The spelling of 20689292 in words is "twenty million, six hundred eighty-nine thousand, two hundred ninety-two".