21337474075 has 6 divisors (see below), whose sum is σ = 26458467884. Its totient is φ = 17069979240.

The previous prime is 21337474073. The next prime is 21337474091. The reversal of 21337474075 is 57047473312.

It is not a de Polignac number, because 21337474075 - 2¹ = 21337474073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21337474073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 426749457 + ... + 426749506.

Almost surely, 2^21337474075 is an apocalyptic number.

21337474075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21337474075 is a deficient number, since it is larger than the sum of its proper divisors (5120993809).

21337474075 is an equidigital number, since it uses as much as digits as its factorization.

21337474075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853498973 (or 853498968 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 43.

The spelling of 21337474075 in words is "twenty-one billion, three hundred thirty-seven million, four hundred seventy-four thousand, seventy-five".