21850536717534 has 48 divisors (see below), whose sum is σ = 50841518652288. Its totient is φ = 6242325708528.

The previous prime is 21850536717511. The next prime is 21850536717547. The reversal of 21850536717534 is 43571763505812.

It is a happy number.

It is a super-2 number, since 2×21850536717534² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1388184 + ... + 6754859.

It is an arithmetic number, because the mean of its divisors is an integer number (1059198305256).

Almost surely, 2^{21850536717534} is an apocalyptic number.

21850536717534 is an abundant number, since it is smaller than the sum of its proper divisors (28990981934754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21850536717534 is a wasteful number, since it uses less digits than its factorization.

21850536717534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152189 (or 8152182 counting only the distinct ones).

The product of its (nonzero) digits is 21168000, while the sum is 57.

The spelling of 21850536717534 in words is "twenty-one trillion, eight hundred fifty billion, five hundred thirty-six million, seven hundred seventeen thousand, five hundred thirty-four".