20830957140 has 192 divisors, whose sum is σ = 71122157568. Its totient is φ = 4446873600.

The previous prime is 20830957099. The next prime is 20830957151. The reversal of 20830957140 is 4175903802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 924205 + ... + 946475.

It is an arithmetic number, because the mean of its divisors is an integer number (370427904).

Almost surely, 2^20830957140 is an apocalyptic number.

20830957140 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 20830957140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35561078784).

20830957140 is an abundant number, since it is smaller than the sum of its proper divisors (50291200428).

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

20830957140 is a wasteful number, since it uses less digits than its factorization.

20830957140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22438 (or 22436 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20830957140 in words is "twenty billion, eight hundred thirty million, nine hundred fifty-seven thousand, one hundred forty".