20447010138 has 8 divisors (see below), whose sum is σ = 40894020288. Its totient is φ = 6815670044.

The previous prime is 20447010131. The next prime is 20447010149. The reversal of 20447010138 is 83101074402.

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

20447010138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20447010131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703917506 + ... + 1703917517.

It is an arithmetic number, because the mean of its divisors is an integer number (5111752536).

Almost surely, 2^20447010138 is an apocalyptic number.

20447010138 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.

20447010138 is a wasteful number, since it uses less digits than its factorization.

20447010138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407835028.

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 20447010138 in words is "twenty billion, four hundred forty-seven million, ten thousand, one hundred thirty-eight".