20343427061 has 4 divisors (see below), whose sum is σ = 20893249452. Its totient is φ = 19793604672.

The previous prime is 20343427057. The next prime is 20343427079. The reversal of 20343427061 is 16072434302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16976526436 + 3366900625 = 130294^2 + 58025^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343427061 - 2² = 20343427057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343427001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274911140 + ... + 274911213.

It is an arithmetic number, because the mean of its divisors is an integer number (5223312363).

Almost surely, 2^20343427061 is an apocalyptic number.

It is an amenable number.

20343427061 is a deficient number, since it is larger than the sum of its proper divisors (549822391).

20343427061 is an equidigital number, since it uses as much as digits as its factorization.

20343427061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549822390.

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 20343427061 in words is "twenty billion, three hundred forty-three million, four hundred twenty-seven thousand, sixty-one".