20343471549 has 16 divisors (see below), whose sum is σ = 29968900992. Its totient is φ = 12209550848.

The previous prime is 20343471539. The next prime is 20343471563. The reversal of 20343471549 is 94517434302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20343471549 - 2²⁰ = 20342422973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20343471549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343471539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8670384 + ... + 8672729.

It is an arithmetic number, because the mean of its divisors is an integer number (1873056312).

Almost surely, 2^20343471549 is an apocalyptic number.

It is an amenable number.

20343471549 is a deficient number, since it is larger than the sum of its proper divisors (9625429443).

20343471549 is a wasteful number, since it uses less digits than its factorization.

20343471549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17343156.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 20343471549 in words is "twenty billion, three hundred forty-three million, four hundred seventy-one thousand, five hundred forty-nine".