20129132558 has 8 divisors (see below), whose sum is σ = 30196144440. Its totient is φ = 10063751080.

The previous prime is 20129132503. The next prime is 20129132563. The reversal of 20129132558 is 85523192102.

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

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, 376253 + ... + 426408.

It is an arithmetic number, because the mean of its divisors is an integer number (3774518055).

Almost surely, 2^20129132558 is an apocalyptic number.

20129132558 is a deficient number, since it is larger than the sum of its proper divisors (10067011882).

20129132558 is a wasteful number, since it uses less digits than its factorization.

20129132558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815202.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 20129132558 in words is "twenty billion, one hundred twenty-nine million, one hundred thirty-two thousand, five hundred fifty-eight".