20869231506 has 8 divisors (see below), whose sum is σ = 41738463024. Its totient is φ = 6956410500.

The previous prime is 20869231499. The next prime is 20869231519. The reversal of 20869231506 is 60513296802.

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

20869231506 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1739102620 + ... + 1739102631.

It is an arithmetic number, because the mean of its divisors is an integer number (5217307878).

Almost surely, 2^20869231506 is an apocalyptic number.

20869231506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20869231506 is a wasteful number, since it uses less digits than its factorization.

20869231506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478205256.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 20869231506 in words is "twenty billion, eight hundred sixty-nine million, two hundred thirty-one thousand, five hundred six".