20858291776 has 63 divisors (see below), whose sum is σ = 48167010219. Its totient is φ = 8935801728.

The previous prime is 20858291759. The next prime is 20858291887. The reversal of 20858291776 is 67719285802.

The square root of 20858291776 is 144424.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8086455 + ... + 8089033.

Almost surely, 2^20858291776 is an apocalyptic number.

20858291776 is the 144424-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20858291776

20858291776 is an abundant number, since it is smaller than the sum of its proper divisors (27308718443).

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

20858291776 is an frugal number, since it uses more digits than its factorization.

20858291776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 20858291776 in words is "twenty billion, eight hundred fifty-eight million, two hundred ninety-one thousand, seven hundred seventy-six".