20529169678 has 8 divisors (see below), whose sum is σ = 30794379480. Its totient is φ = 10264376520.

The previous prime is 20529169657. The next prime is 20529169691. The reversal of 20529169678 is 87696192502.

20529169678 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20529169678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95788 + ... + 224128.

It is an arithmetic number, because the mean of its divisors is an integer number (3849297435).

Almost surely, 2^20529169678 is an apocalyptic number.

20529169678 is a deficient number, since it is larger than the sum of its proper divisors (10265209802).

20529169678 is a wasteful number, since it uses less digits than its factorization.

20529169678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208322.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 20529169678 in words is "twenty billion, five hundred twenty-nine million, one hundred sixty-nine thousand, six hundred seventy-eight".