20225429784 has 160 divisors (see below), whose sum is σ = 64980542880. Its totient is φ = 5757474816.

The previous prime is 20225429779. The next prime is 20225429797. The reversal of 20225429784 is 48792452202.

20225429784 is a `hidden beast` number, since 2 + 0 + 22 + 542 + 9 + 7 + 84 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1248424 + ... + 1264520.

It is an arithmetic number, because the mean of its divisors is an integer number (406128393).

Almost surely, 2^20225429784 is an apocalyptic number.

20225429784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20225429784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32490271440).

20225429784 is an abundant number, since it is smaller than the sum of its proper divisors (44755113096).

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

20225429784 is a wasteful number, since it uses less digits than its factorization.

20225429784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16399 (or 16386 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20225429784 in words is "twenty billion, two hundred twenty-five million, four hundred twenty-nine thousand, seven hundred eighty-four".