20846739456 has 189 divisors, whose sum is σ = 61532507491. Its totient is φ = 6801063936.

The previous prime is 20846739421. The next prime is 20846739499. The reversal of 20846739456 is 65493764802.

The square root of 20846739456 is 144384.

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

20846739456 is a `hidden beast` number, since 20 + 84 + 67 + 39 + 456 = 666.

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, 443547625 + ... + 443547671.

Almost surely, 2^20846739456 is an apocalyptic number.

20846739456 is the 144384-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20846739456

20846739456 is an abundant number, since it is smaller than the sum of its proper divisors (40685768035).

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

20846739456 is an frugal number, since it uses more digits than its factorization.

20846739456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 20846739456 in words is "twenty billion, eight hundred forty-six million, seven hundred thirty-nine thousand, four hundred fifty-six".