20699474 has 8 divisors (see below), whose sum is σ = 32683440. Its totient is φ = 9804996.

The previous prime is 20699473. The next prime is 20699477. The reversal of 20699474 is 47499602.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20699473) 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, 272324 + ... + 272399.

It is an arithmetic number, because the mean of its divisors is an integer number (4085430).

Almost surely, 2^20699474 is an apocalyptic number.

20699474 is a deficient number, since it is larger than the sum of its proper divisors (11983966).

20699474 is a wasteful number, since it uses less digits than its factorization.

20699474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544744.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 20699474 is about 4549.6674603755. The cubic root of 20699474 is about 274.5700123228.

The spelling of 20699474 in words is "twenty million, six hundred ninety-nine thousand, four hundred seventy-four".