20429796144 has 40 divisors (see below), whose sum is σ = 52818014272. Its totient is φ = 6804636480.

The previous prime is 20429796137. The next prime is 20429796187. The reversal of 20429796144 is 44169792402.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 20429796093 and 20429796102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102874 + ... + 226809.

Almost surely, 2^20429796144 is an apocalyptic number.

20429796144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20429796144 is an abundant number, since it is smaller than the sum of its proper divisors (32388218128).

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

20429796144 is a wasteful number, since it uses less digits than its factorization.

20429796144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330985 (or 330979 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 20429796144 in words is "twenty billion, four hundred twenty-nine million, seven hundred ninety-six thousand, one hundred forty-four".