20304534420 has 72 divisors (see below), whose sum is σ = 62600133960. Its totient is φ = 5325776640.

The previous prime is 20304534379. The next prime is 20304534457. The reversal of 20304534420 is 2443540302.

20304534420 is a `hidden beast` number, since 203 + 0 + 4 + 5 + 34 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2533511556 + 17771022864 = 50334^2 + 133308^2 .

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 913635 + ... + 935594.

It is an arithmetic number, because the mean of its divisors is an integer number (869446305).

Almost surely, 2^20304534420 is an apocalyptic number.

20304534420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20304534420 is an abundant number, since it is smaller than the sum of its proper divisors (42295599540).

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

20304534420 is a wasteful number, since it uses less digits than its factorization.

20304534420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849305 (or 1849300 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The spelling of 20304534420 in words is "twenty billion, three hundred four million, five hundred thirty-four thousand, four hundred twenty".