20971874 has 32 divisors (see below), whose sum is σ = 40144896. Its totient is φ = 7978320.

The previous prime is 20971807. The next prime is 20971889. The reversal of 20971874 is 47817902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5039 + ... + 8205.

It is an arithmetic number, because the mean of its divisors is an integer number (1254528).

Almost surely, 2^20971874 is an apocalyptic number.

20971874 is a deficient number, since it is larger than the sum of its proper divisors (19173022).

20971874 is a wasteful number, since it uses less digits than its factorization.

20971874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 20971874 is about 4579.5058685408. The cubic root of 20971874 is about 275.7691919712.

The spelling of 20971874 in words is "twenty million, nine hundred seventy-one thousand, eight hundred seventy-four".