20829994276 has 135 divisors (see below), whose sum is σ = 46702871397. Its totient is φ = 8105348160.

The previous prime is 20829994247. The next prime is 20829994307. The reversal of 20829994276 is 67249992802.

The square root of 20829994276 is 144326.

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

It can be written as a sum of positive squares in 7 ways, for example, as 14191003876 + 6638990400 = 119126^2 + 81480^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20829994276.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 341475286 + ... + 341475346.

Almost surely, 2^20829994276 is an apocalyptic number.

20829994276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20829994276 is the 144326-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20829994276

20829994276 is an abundant number, since it is smaller than the sum of its proper divisors (25872877121).

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

20829994276 is an frugal number, since it uses more digits than its factorization.

20829994276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 20829994276 in words is "twenty billion, eight hundred twenty-nine million, nine hundred ninety-four thousand, two hundred seventy-six".