20936474 has 8 divisors (see below), whose sum is σ = 33820500. Its totient is φ = 9662976.

The previous prime is 20936471. The next prime is 20936483. The reversal of 20936474 is 47463902.

It can be written as a sum of positive squares in 2 ways, for example, as 19228225 + 1708249 = 4385^2 + 1307^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20936471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402599 + ... + 402650.

Almost surely, 2^20936474 is an apocalyptic number.

20936474 is a deficient number, since it is larger than the sum of its proper divisors (12884026).

20936474 is a wasteful number, since it uses less digits than its factorization.

20936474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805264.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20936474 is about 4575.6391903208. The cubic root of 20936474 is about 275.6139407467.

The spelling of 20936474 in words is "twenty million, nine hundred thirty-six thousand, four hundred seventy-four".