20390348 has 48 divisors (see below), whose sum is σ = 40497408. Its totient is φ = 8904000.

The previous prime is 20390333. The next prime is 20390353. The reversal of 20390348 is 84309302.

It is a super-2 number, since 2×20390348² = 831532583122208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20390348.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190511 + ... + 190617.

It is an arithmetic number, because the mean of its divisors is an integer number (843696).

Almost surely, 2^20390348 is an apocalyptic number.

It is an amenable number.

20390348 is a deficient number, since it is larger than the sum of its proper divisors (20107060).

20390348 is a wasteful number, since it uses less digits than its factorization.

20390348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20390348 is about 4515.5672954791. The cubic root of 20390348 is about 273.1963415582.

The spelling of 20390348 in words is "twenty million, three hundred ninety thousand, three hundred forty-eight".