20946974 has 16 divisors (see below), whose sum is σ = 32883840. Its totient is φ = 9988440.

The previous prime is 20946953. The next prime is 20946983. The reversal of 20946974 is 47964902.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 29969 + ... + 30659.

It is an arithmetic number, because the mean of its divisors is an integer number (2055240).

Almost surely, 2^20946974 is an apocalyptic number.

20946974 is a deficient number, since it is larger than the sum of its proper divisors (11936866).

20946974 is a wasteful number, since it uses less digits than its factorization.

20946974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 20946974 is about 4576.7864271779. The cubic root of 20946974 is about 275.6600080824.

The spelling of 20946974 in words is "twenty million, nine hundred forty-six thousand, nine hundred seventy-four".