20464435242 has 64 divisors (see below), whose sum is σ = 47692800000. Its totient is φ = 6492025584.

The previous prime is 20464435231. The next prime is 20464435259. The reversal of 20464435242 is 24253446402.

20464435242 is a `hidden beast` number, since 2 + 0 + 4 + 644 + 3 + 5 + 2 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20464435197 and 20464435206.

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 31 ways as a sum of consecutive naturals, for example, 205759 + ... + 288557.

It is an arithmetic number, because the mean of its divisors is an integer number (745200000).

Almost surely, 2^20464435242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20464435242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23846400000).

20464435242 is an abundant number, since it is smaller than the sum of its proper divisors (27228364758).

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

20464435242 is a wasteful number, since it uses less digits than its factorization.

20464435242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83032 (or 83026 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

The spelling of 20464435242 in words is "twenty billion, four hundred sixty-four million, four hundred thirty-five thousand, two hundred forty-two".