20902219776 has 195 divisors, whose sum is σ = 62690744083. Its totient is φ = 6939648000.

The previous prime is 20902219757. The next prime is 20902219777. The reversal of 20902219776 is 67791220902.

The square root of 20902219776 is 144576.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20902219777) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 83275651 + ... + 83275901.

Almost surely, 2^20902219776 is an apocalyptic number.

20902219776 is the 144576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20902219776

20902219776 is an abundant number, since it is smaller than the sum of its proper divisors (41788524307).

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

20902219776 is an frugal number, since it uses more digits than its factorization.

20902219776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 20902219776 in words is "twenty billion, nine hundred two million, two hundred nineteen thousand, seven hundred seventy-six".