20874511 has 8 divisors (see below), whose sum is σ = 23884704. Its totient is φ = 17871360.

The previous prime is 20874509. The next prime is 20874571. The reversal of 20874511 is 11547802.

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 20874511 - 2¹ = 20874509 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 20874511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874571) 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, 8991 + ... + 11071.

It is an arithmetic number, because the mean of its divisors is an integer number (2985588).

Almost surely, 2^20874511 is an apocalyptic number.

20874511 is a deficient number, since it is larger than the sum of its proper divisors (3010193).

20874511 is a wasteful number, since it uses less digits than its factorization.

20874511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 20874511 is about 4568.8632065318. The cubic root of 20874511 is about 275.3417723117.

The spelling of 20874511 in words is "twenty million, eight hundred seventy-four thousand, five hundred eleven".