20774308464 has 800 divisors, whose sum is σ = 79586017280. Its totient is φ = 5079158784.

The previous prime is 20774308463. The next prime is 20774308517. The reversal of 20774308464 is 46480347702.

20774308464 is a `hidden beast` number, since 207 + 7 + 430 + 8 + 4 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774308463) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 163577169 + ... + 163577295.

Almost surely, 2^20774308464 is an apocalyptic number.

20774308464 is a gapful number since it is divisible by the number (24) 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 20774308464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39793008640).

20774308464 is an abundant number, since it is smaller than the sum of its proper divisors (58811708816).

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

20774308464 is a wasteful number, since it uses less digits than its factorization.

20774308464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 45.

The spelling of 20774308464 in words is "twenty billion, seven hundred seventy-four million, three hundred eight thousand, four hundred sixty-four".