20971107 has 6 divisors (see below), whose sum is σ = 30291612. Its totient is φ = 13980732.

The previous prime is 20971063. The next prime is 20971121. The reversal of 20971107 is 70117902.

It is not a de Polignac number, because 20971107 - 2⁶ = 20971043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20971127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1165053 + ... + 1165070.

It is an arithmetic number, because the mean of its divisors is an integer number (5048602).

Almost surely, 2^20971107 is an apocalyptic number.

20971107 is a deficient number, since it is larger than the sum of its proper divisors (9320505).

20971107 is a wasteful number, since it uses less digits than its factorization.

20971107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330129 (or 2330126 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 20971107 is about 4579.4221251158. The cubic root of 20971107 is about 275.7658300470.

The spelling of 20971107 in words is "twenty million, nine hundred seventy-one thousand, one hundred seven".