20993077 has 8 divisors (see below), whose sum is σ = 24152192. Its totient is φ = 17874000.

The previous prime is 20993059. The next prime is 20993083. The reversal of 20993077 is 77039902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20993077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20993017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8874 + ... + 10987.

It is an arithmetic number, because the mean of its divisors is an integer number (3019024).

Almost surely, 2^20993077 is an apocalyptic number.

It is an amenable number.

20993077 is a deficient number, since it is larger than the sum of its proper divisors (3159115).

20993077 is a wasteful number, since it uses less digits than its factorization.

20993077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20019.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20993077 is about 4581.8202714642. The cubic root of 20993077 is about 275.8620967947.

The spelling of 20993077 in words is "twenty million, nine hundred ninety-three thousand, seventy-seven".