20243401399 has 4 divisors (see below), whose sum is σ = 21800586136. Its totient is φ = 18686216664.

The previous prime is 20243401397. The next prime is 20243401403. The reversal of 20243401399 is 99310434202.

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

It is a cyclic number.

It is not a de Polignac number, because 20243401399 - 2¹ = 20243401397 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 (20243401391) 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, 778592349 + ... + 778592374.

It is an arithmetic number, because the mean of its divisors is an integer number (5450146534).

Almost surely, 2^20243401399 is an apocalyptic number.

20243401399 is a deficient number, since it is larger than the sum of its proper divisors (1557184737).

20243401399 is a wasteful number, since it uses less digits than its factorization.

20243401399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557184736.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 20243401399 in words is "twenty billion, two hundred forty-three million, four hundred one thousand, three hundred ninety-nine".