20154261147 has 4 divisors (see below), whose sum is σ = 26872348200. Its totient is φ = 13436174096.

The previous prime is 20154261133. The next prime is 20154261151. The reversal of 20154261147 is 74116245102.

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

It is a cyclic number.

It is not a de Polignac number, because 20154261147 - 2⁸ = 20154260891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20154261047) 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, 3359043522 + ... + 3359043527.

It is an arithmetic number, because the mean of its divisors is an integer number (6718087050).

Almost surely, 2^20154261147 is an apocalyptic number.

20154261147 is a deficient number, since it is larger than the sum of its proper divisors (6718087053).

20154261147 is an equidigital number, since it uses as much as digits as its factorization.

20154261147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718087052.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 20154261147 in words is "twenty billion, one hundred fifty-four million, two hundred sixty-one thousand, one hundred forty-seven".