20888494 has 8 divisors (see below), whose sum is σ = 34181208. Its totient is φ = 9494760.

The previous prime is 20888489. The next prime is 20888509. The reversal of 20888494 is 49488802.

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 20888494.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474717 + ... + 474760.

It is an arithmetic number, because the mean of its divisors is an integer number (4272651).

Almost surely, 2^20888494 is an apocalyptic number.

20888494 is a deficient number, since it is larger than the sum of its proper divisors (13292714).

20888494 is a wasteful number, since it uses less digits than its factorization.

20888494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949490.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 20888494 is about 4570.3931997149. The cubic root of 20888494 is about 275.4032387359.

The spelling of 20888494 in words is "twenty million, eight hundred eighty-eight thousand, four hundred ninety-four".