20849231040 has 224 divisors, whose sum is σ = 74544814080. Its totient is φ = 4891238400.

The previous prime is 20849230981. The next prime is 20849231083. The reversal of 20849231040 is 4013294802.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20849230992 and 20849231010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295516 + ... + 359204.

Almost surely, 2^20849231040 is an apocalyptic number.

20849231040 is a gapful number since it is divisible by the number (20) 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 20849231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37272407040).

20849231040 is an abundant number, since it is smaller than the sum of its proper divisors (53695583040).

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

20849231040 is a wasteful number, since it uses less digits than its factorization.

20849231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63751 (or 63741 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 20849231040 in words is "twenty billion, eight hundred forty-nine million, two hundred thirty-one thousand, forty".