20494672704 has 224 divisors, whose sum is σ = 65882398080. Its totient is φ = 6195916800.

The previous prime is 20494672703. The next prime is 20494672729. The reversal of 20494672704 is 40727649402.

20494672704 is a `hidden beast` number, since 20 + 494 + 6 + 72 + 70 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20494672704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20494672703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10282332 + ... + 10284324.

Almost surely, 2^20494672704 is an apocalyptic number.

20494672704 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 20494672704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32941199040).

20494672704 is an abundant number, since it is smaller than the sum of its proper divisors (45387725376).

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

20494672704 is a wasteful number, since it uses less digits than its factorization.

20494672704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566 (or 2550 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 20494672704 in words is "twenty billion, four hundred ninety-four million, six hundred seventy-two thousand, seven hundred four".