20920429608 has 256 divisors, whose sum is σ = 61157376000. Its totient is φ = 5910727680.

The previous prime is 20920429591. The next prime is 20920429637. The reversal of 20920429608 is 80692402902.

It is a self number, because there is not a number n which added to its sum of digits gives 20920429608.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34925293 + ... + 34925891.

It is an arithmetic number, because the mean of its divisors is an integer number (238896000).

Almost surely, 2^20920429608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20920429608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30578688000).

20920429608 is an abundant number, since it is smaller than the sum of its proper divisors (40236946392).

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

20920429608 is a wasteful number, since it uses less digits than its factorization.

20920429608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 20920429608 in words is "twenty billion, nine hundred twenty million, four hundred twenty-nine thousand, six hundred eight".