20913476 has 24 divisors (see below), whose sum is σ = 37396800. Its totient is φ = 10231200.

The previous prime is 20913469. The next prime is 20913479. The reversal of 20913476 is 67431902.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20913479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59750 + ... + 60098.

It is an arithmetic number, because the mean of its divisors is an integer number (1558200).

Almost surely, 2^20913476 is an apocalyptic number.

It is an amenable number.

20913476 is a deficient number, since it is larger than the sum of its proper divisors (16483324).

20913476 is a wasteful number, since it uses less digits than its factorization.

20913476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20913476 is about 4573.1254082957. The cubic root of 20913476 is about 275.5129862796.

The spelling of 20913476 in words is "twenty million, nine hundred thirteen thousand, four hundred seventy-six".