21350407735 has 4 divisors (see below), whose sum is σ = 25620489288. Its totient is φ = 17080326184.

The previous prime is 21350407721. The next prime is 21350407781. The reversal of 21350407735 is 53770405312.

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 21350407735 - 2²¹ = 21348310583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21350407694 and 21350407703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135040769 + ... + 2135040778.

It is an arithmetic number, because the mean of its divisors is an integer number (6405122322).

Almost surely, 2^21350407735 is an apocalyptic number.

21350407735 is a deficient number, since it is larger than the sum of its proper divisors (4270081553).

21350407735 is an equidigital number, since it uses as much as digits as its factorization.

21350407735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270081552.

The product of its (nonzero) digits is 88200, while the sum is 37.

The spelling of 21350407735 in words is "twenty-one billion, three hundred fifty million, four hundred seven thousand, seven hundred thirty-five".