20699494 has 8 divisors (see below), whose sum is σ = 32399280. Its totient is φ = 9899736.

The previous prime is 20699491. The next prime is 20699507. The reversal of 20699494 is 49499602.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20699494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20699491) 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, 224949 + ... + 225040.

It is an arithmetic number, because the mean of its divisors is an integer number (4049910).

Almost surely, 2^20699494 is an apocalyptic number.

20699494 is a deficient number, since it is larger than the sum of its proper divisors (11699786).

20699494 is a wasteful number, since it uses less digits than its factorization.

20699494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450014.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 20699494 is about 4549.6696583378. The cubic root of 20699494 is about 274.5701007534.

The spelling of 20699494 in words is "twenty million, six hundred ninety-nine thousand, four hundred ninety-four".