21049570335 has 16 divisors (see below), whose sum is σ = 33867469440. Its totient is φ = 11163718560.

The previous prime is 21049570331. The next prime is 21049570349. The reversal of 21049570335 is 53307594012.

It is a happy number.

It is not a de Polignac number, because 21049570335 - 2² = 21049570331 is a prime.

It is a super-2 number, since 2×21049570335² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21049570293 and 21049570302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21049570331) 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, 3917161 + ... + 3922530.

It is an arithmetic number, because the mean of its divisors is an integer number (2116716840).

Almost surely, 2^21049570335 is an apocalyptic number.

21049570335 is a deficient number, since it is larger than the sum of its proper divisors (12817899105).

21049570335 is a wasteful number, since it uses less digits than its factorization.

21049570335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7839878.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 21049570335 in words is "twenty-one billion, forty-nine million, five hundred seventy thousand, three hundred thirty-five".