21413474394 has 64 divisors (see below), whose sum is σ = 46343404800. Its totient is φ = 6557133312.

The previous prime is 21413474393. The next prime is 21413474413. The reversal of 21413474394 is 49347431412.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21413474393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26468662 + ... + 26469470.

It is an arithmetic number, because the mean of its divisors is an integer number (724115700).

Almost surely, 2^21413474394 is an apocalyptic number.

21413474394 is an abundant number, since it is smaller than the sum of its proper divisors (24929930406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21413474394 is a wasteful number, since it uses less digits than its factorization.

21413474394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039.

The product of its digits is 290304, while the sum is 42.

The spelling of 21413474394 in words is "twenty-one billion, four hundred thirteen million, four hundred seventy-four thousand, three hundred ninety-four".