20779741 has 8 divisors (see below), whose sum is σ = 22052160. Its totient is φ = 19538112.

The previous prime is 20779739. The next prime is 20779751. The reversal of 20779741 is 14797702.

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

It is a cyclic number.

It is not a de Polignac number, because 20779741 - 2¹ = 20779739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20779741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20779751) 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, 6300 + ... + 9013.

It is an arithmetic number, because the mean of its divisors is an integer number (2756520).

Almost surely, 2^20779741 is an apocalyptic number.

It is an amenable number.

20779741 is a deficient number, since it is larger than the sum of its proper divisors (1272419).

20779741 is a wasteful number, since it uses less digits than its factorization.

20779741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15395.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 20779741 is about 4558.4801195135. The cubic root of 20779741 is about 274.9244574873.

The spelling of 20779741 in words is "twenty million, seven hundred seventy-nine thousand, seven hundred forty-one".