20866974 has 8 divisors (see below), whose sum is σ = 41733960. Its totient is φ = 6955656.

The previous prime is 20866969. The next prime is 20867023. The reversal of 20866974 is 47966802.

It is a sphenic number, since it is the product of 3 distinct primes.

20866974 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738909 + ... + 1738920.

It is an arithmetic number, because the mean of its divisors is an integer number (5216745).

Almost surely, 2^20866974 is an apocalyptic number.

20866974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20866974 is a wasteful number, since it uses less digits than its factorization.

20866974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477834.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 20866974 is about 4568.0383098218. The cubic root of 20866974 is about 275.3086298068.

The spelling of 20866974 in words is "twenty million, eight hundred sixty-six thousand, nine hundred seventy-four".