21534650343 has 12 divisors (see below), whose sum is σ = 31107490128. Its totient is φ = 14355564000.

The previous prime is 21534650341. The next prime is 21534650353. The reversal of 21534650343 is 34305643512.

21534650343 is a `hidden beast` number, since 2 + 153 + 465 + 0 + 3 + 43 = 666.

It is not a de Polignac number, because 21534650343 - 2¹ = 21534650341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21534650298 and 21534650307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534650341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108046 + ... + 233972.

It is an arithmetic number, because the mean of its divisors is an integer number (2592290844).

Almost surely, 2^21534650343 is an apocalyptic number.

21534650343 is a deficient number, since it is larger than the sum of its proper divisors (9572839785).

21534650343 is a wasteful number, since it uses less digits than its factorization.

21534650343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144934 (or 144931 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 21534650343 in words is "twenty-one billion, five hundred thirty-four million, six hundred fifty thousand, three hundred forty-three".