21903230147 has 2 divisors, whose sum is σ = 21903230148. Its totient is φ = 21903230146.

The previous prime is 21903230143. The next prime is 21903230179. The reversal of 21903230147 is 74103230912.

It is an a-pointer prime, because the next prime (21903230179) can be obtained adding 21903230147 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21903230147 - 2² = 21903230143 is a prime.

It is not a weakly prime, because it can be changed into another prime (21903230143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10951615073 + 10951615074.

It is an arithmetic number, because the mean of its divisors is an integer number (10951615074).

Almost surely, 2^21903230147 is an apocalyptic number.

21903230147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21903230147 is an equidigital number, since it uses as much as digits as its factorization.

21903230147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 21903230147 in words is "twenty-one billion, nine hundred three million, two hundred thirty thousand, one hundred forty-seven".