20469479040 has 96 divisors (see below), whose sum is σ = 70683689700. Its totient is φ = 5458526208.

The previous prime is 20469479011. The next prime is 20469479059. The reversal of 20469479040 is 4097496402.

20469479040 is a `hidden beast` number, since 20 + 469 + 47 + 90 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20384986176 + 84492864 = 142776^2 + 9192^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1771105 + ... + 1782624.

Almost surely, 2^20469479040 is an apocalyptic number.

20469479040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20469479040 is an abundant number, since it is smaller than the sum of its proper divisors (50214210660).

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

20469479040 is a wasteful number, since it uses less digits than its factorization.

20469479040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553754 (or 3553739 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 20469479040 in words is "twenty billion, four hundred sixty-nine million, four hundred seventy-nine thousand, forty".