20380492 has 24 divisors (see below), whose sum is σ = 39029760. Its totient is φ = 9234960.

The previous prime is 20380489. The next prime is 20380537. The reversal of 20380492 is 29408302.

It is a self number, because there is not a number n which added to its sum of digits gives 20380492.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20593 + ... + 21559.

It is an arithmetic number, because the mean of its divisors is an integer number (1626240).

Almost surely, 2^20380492 is an apocalyptic number.

20380492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20380492 is a deficient number, since it is larger than the sum of its proper divisors (18649268).

20380492 is a wasteful number, since it uses less digits than its factorization.

20380492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1459 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20380492 is about 4514.4758278232. The cubic root of 20380492 is about 273.1523165273.

Adding to 20380492 its reverse (29408302), we get a palindrome (49788794).

The spelling of 20380492 in words is "twenty million, three hundred eighty thousand, four hundred ninety-two".