21534535141 has 24 divisors (see below), whose sum is σ = 25354840320. Its totient is φ = 18234216000.

The previous prime is 21534535123. The next prime is 21534535159. The reversal of 21534535141 is 14153543512.

It is an interprime number because it is at equal distance from previous prime (21534535123) and next prime (21534535159).

It is not a de Polignac number, because 21534535141 - 2⁹ = 21534534629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21534535097 and 21534535106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534535181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8507046 + ... + 8509576.

It is an arithmetic number, because the mean of its divisors is an integer number (1056451680).

Almost surely, 2^21534535141 is an apocalyptic number.

It is an amenable number.

21534535141 is a deficient number, since it is larger than the sum of its proper divisors (3820305179).

21534535141 is a wasteful number, since it uses less digits than its factorization.

21534535141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585 (or 4578 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The spelling of 21534535141 in words is "twenty-one billion, five hundred thirty-four million, five hundred thirty-five thousand, one hundred forty-one".