20866793472 has 486 divisors, whose sum is σ = 74008473903. Its totient is φ = 5648154624.

The previous prime is 20866793471. The next prime is 20866793483. The reversal of 20866793472 is 27439766802.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

20866793472 is a `hidden beast` number, since 2 + 0 + 86 + 6 + 7 + 93 + 472 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10433396736 + 10433396736 = 102144^2 + 102144^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=102144.

It is not an unprimeable number, because it can be changed into a prime (20866793471) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1098252279 + ... + 1098252297.

Almost surely, 2^20866793472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20866793472

20866793472 is an abundant number, since it is smaller than the sum of its proper divisors (53141680431).

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

20866793472 is an frugal number, since it uses more digits than its factorization.

20866793472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 20866793472 in words is "twenty billion, eight hundred sixty-six million, seven hundred ninety-three thousand, four hundred seventy-two".