20216810730 has 128 divisors (see below), whose sum is σ = 52579134720. Its totient is φ = 4957562880.

The previous prime is 20216810729. The next prime is 20216810741. The reversal of 20216810730 is 3701861202.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 11746270 + ... + 11747990.

It is an arithmetic number, because the mean of its divisors is an integer number (410774490).

Almost surely, 2^20216810730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20216810730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26289567360).

20216810730 is an abundant number, since it is smaller than the sum of its proper divisors (32362323990).

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

20216810730 is a wasteful number, since it uses less digits than its factorization.

20216810730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344.

The product of its (nonzero) digits is 4032, while the sum is 30.

The spelling of 20216810730 in words is "twenty billion, two hundred sixteen million, eight hundred ten thousand, seven hundred thirty".