21370751353 has 16 divisors (see below), whose sum is σ = 25767808000. Its totient is φ = 17314115472.

The previous prime is 21370751341. The next prime is 21370751371. The reversal of 21370751353 is 35315707312.

It is a cyclic number.

It is not a de Polignac number, because 21370751353 - 2²⁵ = 21337196921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21370791353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124623 + ... + 241396.

It is an arithmetic number, because the mean of its divisors is an integer number (1610488000).

Almost surely, 2^21370751353 is an apocalyptic number.

It is an amenable number.

21370751353 is a deficient number, since it is larger than the sum of its proper divisors (4397056647).

21370751353 is a wasteful number, since it uses less digits than its factorization.

21370751353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366484.

The product of its (nonzero) digits is 66150, while the sum is 37.

The spelling of 21370751353 in words is "twenty-one billion, three hundred seventy million, seven hundred fifty-one thousand, three hundred fifty-three".