20791436 has 12 divisors (see below), whose sum is σ = 36421728. Its totient is φ = 10385232.

The previous prime is 20791411. The next prime is 20791451. The reversal of 20791436 is 63419702.

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, 3350 + ... + 7266.

It is an arithmetic number, because the mean of its divisors is an integer number (3035144).

Almost surely, 2^20791436 is an apocalyptic number.

It is an amenable number.

20791436 is a deficient number, since it is larger than the sum of its proper divisors (15630292).

20791436 is a wasteful number, since it uses less digits than its factorization.

20791436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 5246 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20791436 is about 4559.7627131244. The cubic root of 20791436 is about 274.9760243560.

The spelling of 20791436 in words is "twenty million, seven hundred ninety-one thousand, four hundred thirty-six".