20920296 has 16 divisors (see below), whose sum is σ = 52300800. Its totient is φ = 6973424.

The previous prime is 20920259. The next prime is 20920301. The reversal of 20920296 is 69202902.

20920296 is nontrivially palindromic in base 11.

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, 435816 + ... + 435863.

It is an arithmetic number, because the mean of its divisors is an integer number (3268800).

Almost surely, 2^20920296 is an apocalyptic number.

It is an amenable number.

20920296 is an abundant number, since it is smaller than the sum of its proper divisors (31380504).

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

20920296 is a wasteful number, since it uses less digits than its factorization.

20920296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871688 (or 871684 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20920296 is about 4573.8710082380. The cubic root of 20920296 is about 275.5429317934.

It can be divided in two parts, 2092029 and 6, that added together give a triangular number (2092035 = T₂₀₄₅).

The spelling of 20920296 in words is "twenty million, nine hundred twenty thousand, two hundred ninety-six".