20776448 has 160 divisors (see below), whose sum is σ = 56567808. Its totient is φ = 7372800.

The previous prime is 20776433. The next prime is 20776451. The reversal of 20776448 is 84467702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670193 + ... + 670223.

Almost surely, 2^20776448 is an apocalyptic number.

20776448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20776448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28283904).

20776448 is an abundant number, since it is smaller than the sum of its proper divisors (35791360).

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

20776448 is a wasteful number, since it uses less digits than its factorization.

20776448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 20776448 is about 4558.1189102523. The cubic root of 20776448 is about 274.9099341419.

The spelling of 20776448 in words is "twenty million, seven hundred seventy-six thousand, four hundred forty-eight".