20429459742 has 16 divisors (see below), whose sum is σ = 43262385552. Its totient is φ = 6409242240.

The previous prime is 20429459723. The next prime is 20429459747. The reversal of 20429459742 is 24795492402.

It is a junction number, because it is equal to n+sod(n) for n = 20429459691 and 20429459700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20429459747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100144309 + ... + 100144512.

It is an arithmetic number, because the mean of its divisors is an integer number (2703899097).

Almost surely, 2^20429459742 is an apocalyptic number.

20429459742 is an abundant number, since it is smaller than the sum of its proper divisors (22832925810).

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

20429459742 is a wasteful number, since it uses less digits than its factorization.

20429459742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200288843.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 20429459742 in words is "twenty billion, four hundred twenty-nine million, four hundred fifty-nine thousand, seven hundred forty-two".