20343208534 has 32 divisors (see below), whose sum is σ = 35463173760. Its totient is φ = 8654673600.

The previous prime is 20343208517. The next prime is 20343208601. The reversal of 20343208534 is 43580234302.

It is a super-2 number, since 2×20343208534² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20343208534.

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, 258487 + ... + 327874.

It is an arithmetic number, because the mean of its divisors is an integer number (1108224180).

Almost surely, 2^20343208534 is an apocalyptic number.

20343208534 is a deficient number, since it is larger than the sum of its proper divisors (15119965226).

20343208534 is a wasteful number, since it uses less digits than its factorization.

20343208534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586476.

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 20343208534 in words is "twenty billion, three hundred forty-three million, two hundred eight thousand, five hundred thirty-four".