47669395021 has 2 divisors, whose sum is σ = 47669395022. Its totient is φ = 47669395020.

The previous prime is 47669395019. The next prime is 47669395049. The reversal of 47669395021 is 12059396674.

It is a happy number.

47669395021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40848452100 + 6820942921 = 202110^2 + 82589^2 .

It is a cyclic number.

It is not a de Polignac number, because 47669395021 - 2¹ = 47669395019 is a prime.

Together with 47669395019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 47669395021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47669395061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23834697510 + 23834697511.

It is an arithmetic number, because the mean of its divisors is an integer number (23834697511).

Almost surely, 2^47669395021 is an apocalyptic number.

It is an amenable number.

47669395021 is a deficient number, since it is larger than the sum of its proper divisors (1).

47669395021 is an equidigital number, since it uses as much as digits as its factorization.

47669395021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 47669395021 in words is "forty-seven billion, six hundred sixty-nine million, three hundred ninety-five thousand, twenty-one".