21035393371 has 4 divisors (see below), whose sum is σ = 21035831544. Its totient is φ = 21034955200.

The previous prime is 21035393363. The next prime is 21035393441. The reversal of 21035393371 is 17339353012.

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 21035393371 - 2³ = 21035393363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21035393371.

It is not an unprimeable number, because it can be changed into a prime (21035393311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136765 + ... + 246526.

It is an arithmetic number, because the mean of its divisors is an integer number (5258957886).

Almost surely, 2^21035393371 is an apocalyptic number.

21035393371 is a deficient number, since it is larger than the sum of its proper divisors (438173).

21035393371 is an equidigital number, since it uses as much as digits as its factorization.

21035393371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438172.

The product of its (nonzero) digits is 51030, while the sum is 37.

The spelling of 21035393371 in words is "twenty-one billion, thirty-five million, three hundred ninety-three thousand, three hundred seventy-one".