20874061 has 4 divisors (see below), whose sum is σ = 22479772. Its totient is φ = 19268352.

The previous prime is 20874059. The next prime is 20874107. The reversal of 20874061 is 16047802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16047802 = 2 ⋅8023901.

It can be written as a sum of positive squares in 2 ways, for example, as 5904900 + 14969161 = 2430^2 + 3869^2 .

It is a cyclic number.

It is not a de Polignac number, because 20874061 - 2¹ = 20874059 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 (20874001) 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 3 ways as a sum of consecutive naturals, for example, 802836 + ... + 802861.

It is an arithmetic number, because the mean of its divisors is an integer number (5619943).

Almost surely, 2^20874061 is an apocalyptic number.

It is an amenable number.

20874061 is a deficient number, since it is larger than the sum of its proper divisors (1605711).

20874061 is a wasteful number, since it uses less digits than its factorization.

20874061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605710.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20874061 is about 4568.8139598806. The cubic root of 20874061 is about 275.3397937474.

The spelling of 20874061 in words is "twenty million, eight hundred seventy-four thousand, sixty-one".