20529693472608 has 192 divisors, whose sum is σ = 60539992712640. Its totient is φ = 6767760384000.

The previous prime is 20529693472529. The next prime is 20529693472619. The reversal of 20529693472608 is 80627439692502.

It is a happy number.

20529693472608 is a `hidden beast` number, since 2 + 0 + 5 + 29 + 6 + 9 + 347 + 260 + 8 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76746066 + ... + 77013102.

It is an arithmetic number, because the mean of its divisors is an integer number (315312462045).

Almost surely, 2^{20529693472608} 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 20529693472608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30269996356320).

20529693472608 is an abundant number, since it is smaller than the sum of its proper divisors (40010299240032).

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

20529693472608 is a wasteful number, since it uses less digits than its factorization.

20529693472608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268038 (or 268024 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 63.

The spelling of 20529693472608 in words is "twenty trillion, five hundred twenty-nine billion, six hundred ninety-three million, four hundred seventy-two thousand, six hundred eight".