20494869 has 8 divisors (see below), whose sum is σ = 27369792. Its totient is φ = 13641600.

The previous prime is 20494853. The next prime is 20494883. The reversal of 20494869 is 96849402.

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

It is not a de Polignac number, because 20494869 - 2⁴ = 20494853 is a prime.

It is a super-2 number, since 2×20494869² = 840079310654322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20494869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20494829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3057 + ... + 7094.

It is an arithmetic number, because the mean of its divisors is an integer number (3421224).

Almost surely, 2^20494869 is an apocalyptic number.

It is an amenable number.

20494869 is a deficient number, since it is larger than the sum of its proper divisors (6874923).

20494869 is a wasteful number, since it uses less digits than its factorization.

20494869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10827.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 20494869 is about 4527.1259094485. The cubic root of 20494869 is about 273.6623480350.

The spelling of 20494869 in words is "twenty million, four hundred ninety-four thousand, eight hundred sixty-nine".