20329147658 has 4 divisors (see below), whose sum is σ = 30493721490. Its totient is φ = 10164573828.

The previous prime is 20329147613. The next prime is 20329147681. The reversal of 20329147658 is 85674192302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20328200929 + 946729 = 142577^2 + 973^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5082286913 + ... + 5082286916.

It is a 1-persistent number, because it is pandigital, but 2⋅20329147658 = 40658295316 is not.

Almost surely, 2^20329147658 is an apocalyptic number.

20329147658 is a deficient number, since it is larger than the sum of its proper divisors (10164573832).

20329147658 is a wasteful number, since it uses less digits than its factorization.

20329147658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164573831.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20329147658 in words is "twenty billion, three hundred twenty-nine million, one hundred forty-seven thousand, six hundred fifty-eight".