47429091021 has 12 divisors (see below), whose sum is σ = 68477504928. Its totient is φ = 29187132624.

The previous prime is 47429091019. The next prime is 47429091023. The reversal of 47429091021 is 12019092474.

It is an interprime number because it is at equal distance from previous prime (47429091019) and next prime (47429091023).

It is not a de Polignac number, because 47429091021 - 2¹ = 47429091019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47429091023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46773745 + ... + 46774758.

It is an arithmetic number, because the mean of its divisors is an integer number (5706458744).

Almost surely, 2^47429091021 is an apocalyptic number.

It is an amenable number.

47429091021 is a deficient number, since it is larger than the sum of its proper divisors (21048413907).

47429091021 is a wasteful number, since it uses less digits than its factorization.

47429091021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93548532 (or 93548519 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 47429091021 in words is "forty-seven billion, four hundred twenty-nine million, ninety-one thousand, twenty-one".