21850381735 has 16 divisors (see below), whose sum is σ = 32271333696. Its totient is φ = 13830571008.

The previous prime is 21850381711. The next prime is 21850381747. The reversal of 21850381735 is 53718305812.

It is a cyclic number.

It is not a de Polignac number, because 21850381735 - 2²³ = 21841993127 is a prime.

It is a super-2 number, since 2×21850381735² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21850381691 and 21850381700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24010954 + ... + 24011863.

It is an arithmetic number, because the mean of its divisors is an integer number (2016958356).

Almost surely, 2^21850381735 is an apocalyptic number.

21850381735 is a deficient number, since it is larger than the sum of its proper divisors (10420951961).

21850381735 is a wasteful number, since it uses less digits than its factorization.

21850381735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48022842.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 21850381735 in words is "twenty-one billion, eight hundred fifty million, three hundred eighty-one thousand, seven hundred thirty-five".