20434625442 has 72 divisors (see below), whose sum is σ = 55618250688. Its totient is φ = 5307690960.

The previous prime is 20434625441. The next prime is 20434625483. The reversal of 20434625442 is 24452643402.

20434625442 is a `hidden beast` number, since 20 + 4 + 3 + 4 + 625 + 4 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20434625397 and 20434625406.

It is not an unprimeable number, because it can be changed into a prime (20434625441) 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 35 ways as a sum of consecutive naturals, for example, 654918 + ... + 685409.

It is an arithmetic number, because the mean of its divisors is an integer number (772475704).

Almost surely, 2^20434625442 is an apocalyptic number.

20434625442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20434625442 is an abundant number, since it is smaller than the sum of its proper divisors (35183625246).

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

20434625442 is a wasteful number, since it uses less digits than its factorization.

20434625442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340364 (or 1340350 counting only the distinct ones).

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

The spelling of 20434625442 in words is "twenty billion, four hundred thirty-four million, six hundred twenty-five thousand, four hundred forty-two".