20720158000 has 80 divisors (see below), whose sum is σ = 50176208160. Its totient is φ = 8275680000.

The previous prime is 20720157967. The next prime is 20720158001. The reversal of 20720158000 is 85102702.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20720158001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1394611 + ... + 1409389.

It is an arithmetic number, because the mean of its divisors is an integer number (627202602).

Almost surely, 2^20720158000 is an apocalyptic number.

20720158000 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 20720158000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25088104080).

20720158000 is an abundant number, since it is smaller than the sum of its proper divisors (29456050160).

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

20720158000 is a wasteful number, since it uses less digits than its factorization.

20720158000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15503 (or 15487 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The spelling of 20720158000 in words is "twenty billion, seven hundred twenty million, one hundred fifty-eight thousand".