20974806 has 24 divisors (see below), whose sum is σ = 45752304. Its totient is φ = 6944400.

The previous prime is 20974769. The next prime is 20974813. The reversal of 20974806 is 60847902.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1141 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (1906346).

Almost surely, 2^20974806 is an apocalyptic number.

20974806 is an abundant number, since it is smaller than the sum of its proper divisors (24777498).

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

20974806 is a wasteful number, since it uses less digits than its factorization.

20974806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876 (or 7873 counting only the distinct ones).

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

The square root of 20974806 is about 4579.8259792267. The cubic root of 20974806 is about 275.7820427953.

It can be divided in two parts, 2097 and 4806, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 20974806 in words is "twenty million, nine hundred seventy-four thousand, eight hundred six".