20874906 has 24 divisors (see below), whose sum is σ = 48708660. Its totient is φ = 6422976.

The previous prime is 20874899. The next prime is 20874913. The reversal of 20874906 is 60947802.

It is an interprime number because it is at equal distance from previous prime (20874899) and next prime (20874913).

It can be written as a sum of positive squares in 2 ways, for example, as 18844281 + 2030625 = 4341^2 + 1425^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 44371 + ... + 44838.

Almost surely, 2^20874906 is an apocalyptic number.

20874906 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20874906 is an abundant number, since it is smaller than the sum of its proper divisors (27833754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20874906 is a wasteful number, since it uses less digits than its factorization.

20874906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89230 (or 89227 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20874906 is about 4568.9064337104. The cubic root of 20874906 is about 275.3435090281.

The spelling of 20874906 in words is "twenty million, eight hundred seventy-four thousand, nine hundred six".