20615741 has 8 divisors (see below), whose sum is σ = 21765120. Its totient is φ = 19472832.

The previous prime is 20615731. The next prime is 20615767. The reversal of 20615741 is 14751602.

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 20615741 - 2²² = 16421437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20615741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615731) by changing a digit.

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, 5861 + ... + 8693.

It is an arithmetic number, because the mean of its divisors is an integer number (2720640).

Almost surely, 2^20615741 is an apocalyptic number.

It is an amenable number.

20615741 is a deficient number, since it is larger than the sum of its proper divisors (1149379).

20615741 is a wasteful number, since it uses less digits than its factorization.

20615741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20615741 is about 4540.4560343648. The cubic root of 20615741 is about 274.1992840458.

The spelling of 20615741 in words is "twenty million, six hundred fifteen thousand, seven hundred forty-one".