20402322343 has 4 divisors (see below), whose sum is σ = 21971731768. Its totient is φ = 18832912920.

The previous prime is 20402322323. The next prime is 20402322371. The reversal of 20402322343 is 34322320402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34322320402 = 2 ⋅17161160201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402322343 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 (20402322323) 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, 784704693 + ... + 784704718.

It is an arithmetic number, because the mean of its divisors is an integer number (5492932942).

Almost surely, 2^20402322343 is an apocalyptic number.

20402322343 is a deficient number, since it is larger than the sum of its proper divisors (1569409425).

20402322343 is a wasteful number, since it uses less digits than its factorization.

20402322343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569409424.

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 20402322343 its reverse (34322320402), we get a palindrome (54724642745).

The spelling of 20402322343 in words is "twenty billion, four hundred two million, three hundred twenty-two thousand, three hundred forty-three".