20739982 has 8 divisors (see below), whose sum is σ = 32747400. Its totient is φ = 9824184.

The previous prime is 20739947. The next prime is 20740003. The reversal of 20739982 is 28993702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272857 + ... + 272932.

It is an arithmetic number, because the mean of its divisors is an integer number (4093425).

Almost surely, 2^20739982 is an apocalyptic number.

20739982 is a deficient number, since it is larger than the sum of its proper divisors (12007418).

20739982 is a wasteful number, since it uses less digits than its factorization.

20739982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545810.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 20739982 is about 4554.1170384609. The cubic root of 20739982 is about 274.7490029364.

The spelling of 20739982 in words is "twenty million, seven hundred thirty-nine thousand, nine hundred eighty-two".