20709179000 has 128 divisors (see below), whose sum is σ = 51488161920. Its totient is φ = 7769344000.

The previous prime is 20709178999. The next prime is 20709179033. The reversal of 20709179000 is 97190702.

It is a congruent number.

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, 5285042 + ... + 5288958.

It is an arithmetic number, because the mean of its divisors is an integer number (402251265).

Almost surely, 2^20709179000 is an apocalyptic number.

20709179000 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 20709179000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25744080960).

20709179000 is an abundant number, since it is smaller than the sum of its proper divisors (30778982920).

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

20709179000 is a wasteful number, since it uses less digits than its factorization.

20709179000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266 (or 4252 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 35.

The spelling of 20709179000 in words is "twenty billion, seven hundred nine million, one hundred seventy-nine thousand".